As awesome as Sephiroth was, Kratos would whoop his ass.
As others have already said, he has killed Gods.
- 2010 MUST Haves: WKC, Heavy Rain, GoWIII, Fable III, Mass Effect 2, Bayonetta, Darksiders, FFXIII, Alan Wake, No More Heroes 2, Fragile Dreams: FRotM, Trinity: SoZ, BFBC2.
- Older Need To Buys: Super Mario Bros. Wii, Mario Kart Wii, Deadspace, Demon's Souls, Uncharted 2.
There is definitely more to list that I want, but that's my main focus there.