God damn I missed this whole discussion?. Forever late.
Well I think at this stage in the game I've faced pretty much everyone, but I've yet to have a big feud with some guys and the ones I would want to do would be the following.
My Sheamus Vs Slim's Rock: I was always on the opposite brand to slim's Rock, although I believe we had one match, but never a feud or a big match or anything, so I missed that boat.
My Shark Boy Vs Dresden's Stone Cold: Oh boy, this would've been something. We had a few altercations and ended up teaming for the most point, but a feud would've been money.
My Jack Swagger Vs Vita' Morrison: Was due to happen at Wrestlemania 2 in ETW but fell through for whatever reason, would've been brilliant to test myself against the V-Man at that point.
My Sheamus Vs Prod's Big Show: We had one match where I won, but it was close if I remember, and I think, if given time, we'd tear it down.
My Shark Boy Vs STP's Steiner: Would've just been win in my humble opinion.
My Sheamus Vs LK's Orton: Always wanted to feud with Greg as he ruled the roost in CWA with Orton, but I wouldn't put myself in the World Title picture, would be another good one.
My Paul Burchill Vs Itch's CM Punk: Was due happening on Smackdown before I believe Punk got drafted, but I got a beasting feud out of Lewb's Del Rio anyway so couldn't ask much more out of Paul Burchill. But I never got a crack at Itch's Punk with anyone, so would've been interesting to see how I fared.
My Jack Swagger Vs Bingo's Zach Gowen: Still never got the big match, still pissed about it XD.
My Shark Boy Vs Chico Santana's Santino Marella: Would've just been hilarious.
There's certainly others out there, never got the big feud's with EoR, Chase, Aniking, SBS, Justin, --RKO--, rey619, Killa and Hitman among others. Still might happen with some of you, but it seems everyone's slowing down these days or out of the game completely.