We have Gyrich and Gambit absolutely 99% for realsies (that 1% being the margin of error inherent in every comic book death). 90% certain Bolivar Trask (unless he can be powered back up and even then, is life as a hidden Sentinel really being yourself).
And a very good chance that Sebastian Shaw, Dazzler, and Squidboy are dead from the Genosha attack based on Jean's psychic whatevers. Callisto also had a picture of her in memoriam so she's on the sliding scale towards deadness.
Am I missing anyone named?
Banshee. Madelyn.
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"I will be your superhero!!!" STEAM ID: BombermanGOLDEN