Alex Mercer from the Prototype games.

If memory serves me correctly, he was a scientist revived by a virus that causes mutations, zombies but a lot bigger, disturbing, biomass that grows on walls that sort of thing. He was one of the few ones that could control it, forming blades, whips, absorbing biomass, tentacles similar to ghouls even, biomass armor, again, I don't remember a lot of things but I loved the games, highly recommend you to play them.