The second member of my fantasy Avengers is...
Genis-Vell/Marvel's Captain Marvel/Photon
Probably the most cosmic character in the 616 Universe aside from Silver Surfer and the likes of him, comes Genis-Vell. He's basically Green Lantern and then some. There are many incarnations of this character, from a Kree warrior to a Green Lantern equivalent, to a cosmic champion that is one of a kind. I've always liked this design and just really dug the character. I mean, at one time he was stuck inside Rick Jone's body.
He's no longer Captain Marvel, but Photon. His current costume is alright, but a little too Starman for my taste.
I still think his powers and attitude are what a good team needs, especially on an Avengers team.