I picked Marciano because he's also an aggressor, and had underrated technical ability. His stance was excellent, but in more of a hand-up posture like you like (until he started bombing). Hands in proximity to face, lead shoulder slightly raised via tilt, head off-center, and despite that right looking very relaxed, it's chambered:
I'm talking about pulling high guard while I'm repositioning. "Packing for travel" when I'm not punching. After the first punch lands I don't bother putting my hands up for the rest of the combination even though I know I'm not firing back. It allows combinations to land clean versus cutting the rest of the combo off... which looks like shit on my part.