If there's no username next to the superstars name then it's not taken yet .

Alberto Del Rio -
Big Show -
Chavo -
Chris masters -
Christian - William Jason Reso
Cody Rhodes -
Curt Hawkins -
Dolph Ziggler -
Edge - I Rated R Superstar I
Drew McIntyre - Drew Galloway McIntyre
Kaval - Its kaval
Jack Swagger -
Joey Murcury -
Luke Gallows -
JTG -
Shad -
Kane - Glenn Thomas Jacobs
The Undertaker -