"Who is that mighty one who seems to heed not"

Capaneus in Circle 7
Public DomainCapaneus in Circle 7 - Credit: William Blake

(Canto 14, line 46)

This is Capaneus, one of the Seven Kings against Thebes. For sources to his defiant attitudes against the gods, see Statius' Thebaid, for example book 3: "Valour and the good sword in my hand are the gods I worship ... Fear first created gods in the world!" The same poem treats memorably (in book 10) his death by a divine thunderbolt on the walls of Thebes after he has challenged the guardian gods of the city (Alcides and Bacchus) together with Zeus himself.