Today's House of M box set review mentioned that ToyBiz had done a decent job of giving us characters from this big crossover - more than you might think.
Obviously, you've got the four figures in this box set: Iron Man, Inhuman Torch, Hulk and the It. Then there's Air Strike Wolverine, wearing his SHIELD uniform. There's also the craptacular Spider-Sense Spider-Man, which would be a lot better without its two dumb action features.
The selection is deeper than that, though, if you want to get clever. Carol Danvers went by the name of Captain Marvel during the House of M, but she wore her normal costume. Iceman was a Horseman of Apocalypse. Cloak was released in the Marvel Select line, and even though he was more of an accessory than a figure, he's still a good backdrop for your own HoM display - though why, if he's a mutant, was he on the humans' side?
So, what other figures do we already have that would look perfectly at home in the House of M?