He's been in a lot of stuff. He was one of the only dude members of the team for a while, he ran the second X-Factor team, he had a series were he lead an alternate reality version of the X-men that included a vampire Storm and a demonic Angel.

Augh, there's this scene I love before Inferno in which he and Madelyne are bonding over their respective love-hate relationships towards Scott. She still loves Scott, but hates him for abandoning her and their baby in their time of need. Havok loves Scott, but hates being compared to him and what he did to his wife, which makes him feel guilty because he's starting to fall for Madelyne. It's a great scene.

I need to post more stuff with him.