They can be good, evil or something in-between, the only condition is that they have appeared in one of the X-men tv shows :
1) Magneto
2) Gambit
3) Wolverine
4) Cable
5) Apocalypse
6) Mister Sinister
7) Beast
8) Rogue
9) Mystique
10) Omega Red
Honorable Mentions
-Forge
-Xavier
-Colossus
-Gorgeous George
(Formerly known as BigDevilsAdvocate)
[deleted]
1- Wolverine
2- Gambit
3- Apocalypse
4- Mr. Sinister
5- Jean Grey / Phoenix
6- Beast
7- Rogue
8- Iceman
9- Mystique
10-Cable
Wolverine
Cyclops
Cable
Gambit
Bishop
Sabertooth
Jean Grey
Mister sinister
Xavier
Magneto
1992 only list
1- Cyclops
2- Gambit
3- Beast
4- Magneto
5- Colossus
6- Cable
7- Wolverine
8- Mister Sinister
9- Sabertooth
10- Bishop
Including all of the comic books, spinoffs, TV Shows, and movies.
X-Men
1-Rogue
2-Storm
3-Cyclops
4-Gambit
5-Beast
6-Psylocke
7-Kitty Pride
8-Wolverine
9-Colossus
10-Classic Nightcrawler/Classic Iceman
Other Characters
1.Lilandra
2. Leech
3. Deadpool
4. Cable
5. Warlock (Cosmic)
6. Gladiator
7. Longshot
8. Moira McTaggart
Villains
1A-Magneto
1B-Apocalypse
3-Juggernaut
4. Onslaught
5. Spiral
6. Mojo
7. Mystique
8. Mr. Sinister
9. Dark Phoenix
10. Gideon Black Tom Cassidy
1) Gambit
2) Magneto
3) Nightcrawler
4) Wolverine
5) Rogue
6) Mystique
7) Colossus
8) Beast
9) Mister Sinister
10) Scarlet Witch. Wished she had more screen time to show off her powers.
I found Jean Grey really whiny in this, although her powers/abilities are top 3.