Here's a fun one.
Thor (Marvel Comics), the God of Thunder vs
Pelinal Whitestrake (The Elder Scrolls), the Star-Forged Cyborg Knight from the future
Connections:
Both are warrior demigods who fought in genocidal campaigns against the enemies of their respective races. Pelinal wanted to exterminate every last elf and khajiit and Thor did the same against the frost giants and the last remaining dark elves.
Both have wildly different stances regarding their demigodhood. While Thor almost revels in his status as the God of Thunder, Pelinal abhors any mention of his own divine lineage and will brutally murder anyone that brings it up, regardless of friend or foe.
Both are identifiable by an artifact they use - Mjolnir and the Amulet of Kings.
Pelinal is a time traveller, Thor can time travel using Mjolnir.
Both can enter a frenzied state referred to as the Madness where they become hugely more powerful than before.
Both are best friends, almost brothers, with a bull faced being. Those being Beta Ray Bill, the last of his kind, and Morihaus the winged bull, first of his kind.
Both their identities can be assumed or inherited by others when they don their equipment. Jane Foster becoming Thor and the Hero of Kvatch/Champion of Cyrodiil becoming Pelinal reborn during the events of TES4: Oblivion.
Both found their match in a great foe who was the ultimate test of their mettle, and the battle had adverse consequences for their future. Thor losing his worthiness when he was told that Gorr was right and Pelinal losing his life after the remaining Ayleids tore him apart when he fell exhausted after his battle with Umaril the Unfeathered, king of the Ayleids.
Good Alts: Doomslayer