Solid

Solid served in the Final Great War (Ragnarok), and his professionalism of Nuclear Throne resulted in the final doomsday device being used. He unlocked all B Skins legitimately, and so the world ended, but not on a negative note. Solid then used his Multiversal+ Nuclear Throne Portal Skills to travel to another dimension and become a badass.

His favourite Mutant is Fish. Because he roll and he got eyepatch. That's about all there is.

Did I mention all B Skins involves Melting?

Did I also mention he has achievements "Good Riddance", "Everything Hurts", "Way of the Chicken", "Never Look Back", "Unstoppable", "Frog Zone", "Impossible", "Go Hard", "Vault Raider" and "Ultra Mutant"? He truly is the professional to end all jobs.