RB Silva's Captain Britain during the X of Swords event was perfection, that Excalibur issue is so lush. He teased several months ago that he has an X-project coming up and I just can't wait to see more of his gorgeous renditions of X-characters.
Larroca's Betsy on X-Treme X-Men, in both her Asian body and in her original body in that great flashback sequence at the start of the book, was also superb. I would love to see him draw her in her Captain Britain look.
Back when Claremont was planning to bring Betsy back in her original body and reveal her as Elias Bogan's pet telepath, Salva redesigned her look - they ended up never using this design which I can't say I particularly cared for, unless Betsy was planning for a night at the local S&M club: