Here are some of the guys you see on multiple sites.

Jake Jenkins
BG East
Rock Hard Wrestling
(also did solos at Sean Cody and All American Heroes I believe)

Chace LaChance:
BG East
Thunder's Arena
Muscle Domination Wrestling
Cameron Wrestler (Cameron Matthew's Website)
Johnny Firestorm's website

Brad Barnes:
BG East
Thunder's Arena
Muscle Domination Wrestling
Cameron Wrestler
Johnny Firestorm's website (no one has uploaded torrents from this yet!)

Austin Cooper:
BG East
Thunder's Arena
Cameron Wrestler
Can-Am Wrestling
Rock Hard Wrestling

Z-Man:
BG East
Can-Am Wrestling
Cameron Wrestler
Thunder's Arena
Johnny Firestorm's website

Flash LaCash
BG East
Cameron Wrestler
Johnny Firestorm's website

Guido Genatto
BG East
Thunder's Arena
Cameron Wrestler
Johnny Firestorm's website

Brian Cage/Barry Burke
BG East
Thunder's Arena
Cameron Wrestler
Can-Am Wrestling

Chet Chastain/Randy Winters/Randy Summers
BG East
Cameron Wrestler

Maverick
Cameron Wrestler
Can-Am Wrestling

Kharn/Karn
Cameron Wrestler
Can Am Wrestling

Kelly King
BG East
Can-Am Wrestling
Cameron Wrestler

Nick Justice
Can-Am Wrestling
Cameron Wrestler

Archer
BG East
Thunder's Arena

Dick Rick
BG East
Cameron Wrestler

Brute Baynard
Thunder's Arena
BG East
Can-Am
Cameron Wrestler

Big Sexy
Thunder's Arena
Can-Am (As Eddy Brock)

Ethan Andrews/Axel (perhaps the most prolific)
BG East
UCW
Cameron Wrestler
Can Am
Thunder's Arena
Rock Hard Wrestling
Movimus Wrestling

Morgan Cruise
BG East
Muscle Domination Wrestling
His own website

Damian Rush
BG East
Muscle Domination Wrestling
Morgan Cruise's website

Specimen
Muscle Domination Wrestling
Thunder's Arena
(plus some porn and fetish sites..I think all he ever got from a guy was a BJ)

Mutant
Muscle Domination Wrestling
Thunder's Arena

The Mountain
Muscle Domination Wrestling
Cameron Wrestler

Carter Alexander
BG East
Muscle Domination Wrestling

Tatum Riggs
BG East
Muscle Domination Wrestling

Josh Avery
BG East
UCW (Forgot his name there)

Braden Charron (the porn star)
BG East
Can-Am
Thunder's Arena
Muscle Domination Wrestling
Cameron Wrestler

Ray Naylor
UCW
BG East

Mickey Hanlon (my future husband…love this dude) and his brother Jarret
NRW
Movimus

Josh Steel/Tom Faulk (the porn star)
Rock Hard Wrestling
Movimus

Chasyn Rance/Chase Sinn (a registered sex offender for the statutory rape of a female minor)
Cameron Wrestler
Can-Am

Zach Reno
BG East
Cameron Wrestler

Aryx Quinn
BG East
Can Am

Matt Reid
BG East
NHB/Movimus

Caleb Brand/Danny Duggan
BG East
Can-Am
upcoming fighter on Cameron Wrestler

Lane Hartley
BG East
Cameron Wrestler
Can-Am
Thunder's Arena

Dominic/Flex Steel/Harrison
Thunder's Arena
Can-Am
Did a solo at Sean Cody

Parker London (the porn star)
Thunder's Arena (as Dallas)
Naked Kombat

Cameron Matthews (ok he's the most prolific)
BG East
Can-Am
Cameron Wrestler
Thunder's Arena
Movimus
and some obscure defunct website called Grapple World...I found a few of the videos.