Captain Titus from Spacemarine. Its not even a fight, its as if a giant fought a puppy. He'd just have to grab my by my neck, squeeze slightly, and I'd be dead or crippled for life. Lets put it this way, one of the trials some spacemarine chapters put their recruits through is when they're recruiting, a child about 10-15 must fight an unarmored space marine, and NOT DIE. And these kids are literally the best of the best on deathworlds! Fighting a fully armored spacemarine captain, who may or may not have an iron halo(For those of you who don't know, an Iron Halo is a forcefield generator)? My chances are literally zero.