I beg your pardon?
When was the last time you saw a heroic, strong, cool male character that didn't have a chiseled jaw and abs you could knock on?
Name someone who isnt Tyrion Lannister.
Easy. Mario, Luigi, Guybrush Threepwood, Leisure Suit Larry, the various young/skinny androgynous Jrpg protagonists and party companions, just look at the varied and different shapes and sizes and weight within Team Fortress 2's cast of dudes, Max Payne, Gordon Freeman... I could go on.
Seth Rogen recently played Green Hornet, a superhero, and he doesn't have a chiseled jaw or abs or is overly muscular in any way.
None of it has to do with the sexualization of men, however. Possessing muscles, chiseled jaw, and built to look strong does not automatically equate to sexualization. Muscles, rugged looks, strength -- this is idealized body imagery of men. A man looking strong, capable, muscular, grizzled, (hyper)masculine isn't done solely to appeal to women, it is done much more to appeal to other men. It is part of the male heroic power fantasy. Hawke or Shepard in BioWare's trailers, chiseled and muscular, capable and embattled, isn't firstly or even secondly created for women to look at and go ga-ga over. It is made for men, to play out their heroic power fantasy. In that way, it isn't sexualization.
Women, by contrast, are created and portrayed with a heavy bias toward being attractive and someone the player/male audience wants to sleep with. The progressive sexualization of Samus Aran over the years and pre-reboot Lara Croft are easy examples of that. It's not as though dude heroes are in skimpy catsuits (and less) like in Mass Effect, or making moaning sounds while crawling through tight spaces and a camera focused on the butt like in certain Tomb Raider games. They're not often created solely to tap into a woman heroic power fantasy without sexualized trappings.