The ranking of top ten warriors of Ramayana would be as follows
1 Lord Rama/ Sita
He was the avatar of Vishnu and is said to possess all the celestial weapons of Treta yug.
He defeated and killed powerful demons like Maricha, Viradha, Tarakasura, Kabandha and Subahu in dandaka forest. He killed Khara, Doosana along with 14000 rakshasas single handedly
Lord Rama is powerful enough to destroy the three words and recreate the universe. when he is in anger even Brahma, Lord Shiva or Indra are incapable of facing him.
He easily had the capability to demolish the entire rakshasa clan of Ravana single handedly within seconds but in order to follow his restrictions as a human he did not try to do so.
Sita killed Sahasra Ravana in adhbuta Ramayana assuming maha kali form who was even powerful than Ravana.
Sita was powerful enough to burn down Ravana by her glance but to follow her restriction as a human and as she wanted Rama to save her she did not try to do so
She is Mata Mahalakshmi and the supreme personality of godhead.
She is Adiparashakti and mool prakraiti and Mother of infinite universes.
2 Hanuman/ Lakshmana
He was the incarnation of Lord Shiva and the son of Vayu dev
He had a boon from Brahma that no celestial weapon can kill him.
Hanuman had the ability to change his form and fly in the air
Hanuman had injured Kumbhkarana and broken his spike and made him retreat. He easily could kill Kumbhkarana and save Sugriva but not to defame him he refused to do so
He made Ravana unconscious with a single blow of his fist and was fighting mildly with him because Rama had vowed to kill him
Hanuman killed powerful demons like Jambumali, Akapana, Dhoomarshaka, Nikumbha and Devatanka and burnt the entire Lanka in front of Ravana
He was the incarnation of Sheshnag and had knowledge of many powerful weapons like Rama
Lakshmana overpowered twice in battle even with the Brahma armour once but got defeated because he was fighting mildly as Rama had vowed to kill him
He defeated and killed Indrajit and Atikaya
He overpowered Kumbhkarana who got so impressed by his bravery that he stopped fighting him
Ravana who lifted Kailasha mountain along with Shiva and Parvati, who had lifted Himavat and Meru mountains failed to move Lakshmana even a millimetre when he invoked his divine powers
3 Sage Vishwamitra/ Sage Vashishta
Sage Vashishta had Brahmandastra the most powerful weapon of the universe
he destroyed all the celestial weapons of Vishwamitra including the Trident and Sudharsana discus using Brahmandastra
He trained Rama, Lakshmana, Bharata and Shatrughana in archery.
On the other hand talking about Sage Vishwamitra there was nothing he did not know about warfare.
He possessed all the celestial weapons of Treta yug including Pashupatastra, Vaishnavastra, Narayanastra, Brahmashirastra, Trishul and Sudharsana chakra too.
Sage Vishwamitra is said to have conquered the heaven along with Indra and other gods.
His ascetic merit shielded him from all types of attacks and he was powerful enough to frighten the gods by his penance.
He threatened to curse the Ishwaku dynasty when King Dashratha refused to send Rama with him. He could have easily killed Maricha and Subhahu who were disrupting the sacrifice but because of taking part in the sacrifice he could not do so
4 Parshurama
He was the sixth incarnation of Vishnu who was trained y Mahadeva and obtained celestial weapons like Pashupatastra, Vaishnavastra, Narayanastra and Brahmashirastra from him
He killed the mighty king Kartavirya Arjuna who had defeated Indra and the 33 gods and had wiped the earth clean of kshatriyas 21 times along with Vijaya bow
He fought Ganesha on Mount Mahendra and broke his tusk with his divine parashu hence Ganesha was called as Ekdanta
Parshurama fought Mahadeva for 21 days and injured him with his divine parashu hence Mahadeva was called as Shiva Parashu
5 Kartavirya Arjuna
He was the incarnation of Sudharsana chakra of Vishnu
He effortlessly defeated Indra and the 33 gods riding on a single chariot
Kartavirya Arjuna is said to have conquered the entire earth by the strength of his weapons
He defeated Ravana in a fierce battle and captured him alive
At one time he became so strong that Vishnu had to incarnate in human form as Parshurama to kill him.
6 Vali
He was the son of Indra and king of Kishkinda
He defeated and killed a demon named Mayavi by fighting him for many days.
Vali defeated and killed a demon named Dundhubi who was feared by Varun dev and Himavat.
Vali defeated Ravana and dragged him across four oceans. Ravana was not even able to free himself from Vali
He defeated Sugriva in a wrestling fight who had overpowered Ravana in wrestling combat.
7 Ravana
He was powerful enough to lift the Kailasha mountain with Mahadeva.
Ravana overpowered Hanuman in physical fight and defeated Nila and Sugriva. He is said to have every kind of celestial weapon as per Valmiki.
Ravana defeated Lakshmana twice in battle and fought a fierce battle with Rama for seven days
Even the arrows by which Rama killed Maricha, Vali, Viradha, Khara and Dhoosana had no effect on Ravana
8 Indrajit
He defeated Devraj Indra, captured him and brought him to Lanka.
He obtained power of Tamsi Maya from Mahadeva by which he could attack his enemy invisibily and a boon from Brahma that no one can defeat him once he completes his Nikumbhala sacrifice.
He defeated Rama, Lakshmana and the entire vanara army with Brahmastra and killed 66 crore vanaras using Brahmastra
He put up a fierce fight with Lakshmana for 3 days who was aided by Hanuman, Vibhishana, Jabavant and protected by the gods. Lakshmana was greviously injured after the fight and had to be cured by the medicinal herbs
9 Atikaya
He was strong enough to paralyse thunderbolt of Indra with normal arrows.
He defeated the noose of varun deva. He obtained celestial weapons from Brahma and an impenetratable Brahma armour
Seeing the physical body of Atikaya the vanaras thought him to be Kumbhkarana and fled in terror.
Vibhishana feared that he would destroy the entire vanara army in a single day if not stopped.
Atikaya gave a good fight to Lakshmana in archery and even made him unconscious with a single arrow.
10 Kumbhkarana
He was physically the strongest rakshasa of Treta yug and the only demon who defeated Indra, Yama and the 33 gods without any aid of boons
Kumbhkarana became such a threat to the world that fearing him Brahma cursed him to sleep for six months.
He overpowered Hanuman with his spike and defeated vanara generals like Sugriva, Angada, Nila and Rishaba
Rama,’ s arrows failed to have any impact on him and the arrow by which Rama killed Vali had zero impact on him
Lord Rama had to use four celestial weapons to kill Kumbhkarana.
