Suggestions by @dandandandandan

Shrek

as Green in Fictional Characters by Colours of the Rainbow

Score: -2

Tommy Oliver/Green Ranger

as Green in Fictional Characters by Colours of the Rainbow

Score: +1

Blue (Blue's Clues)

as Blue in Fictional Characters by Colours of the Rainbow

Score: +1

Red Hood (Jason Todd)

as Red in Fictional Characters by Colours of the Rainbow

Score: +1

Black Mask

as Black in Fictional Characters by Colours of the Rainbow

Score: +1

Black Hat

as Black in Fictional Characters by Colours of the Rainbow

Score: +2

Bill Farmer

as Mr. Hippo in Five Nights at Freddy's Voices Headcanons

Score: +1

Tom Kenny

as Toy Bonnie in Five Nights at Freddy's Voices Headcanons

Score: +1

Tom Kenny

as Toy Bonnie Bunny in Five Nights at Freddy's

Score: +1

Shayne Topp

as Johnny Cage in Mortal Kombat

Score: +1

Neil Patrick Harris

as Alastor in Hazbin Hotel (Voice Cast)

Score: +3

Green Goblin (Norman Osborn)

as Green in Fictional Characters by Colours of the Rainbow

Score: +1

Bruno Madrigal

as Green in Fictional Characters by Colours of the Rainbow

Score: +1

Wario

as Yellow in Fictional Characters by Colours of the Rainbow

Score: +1

Black Knight (Monty Python)

as Black in Fictional Characters by Colours of the Rainbow

Score: +2

Black Knight

as Black in Fictional Characters by Colours of the Rainbow

Score: +1

MatPat

as Alan "Brain" Powers in Arthur: The New Generation

Score: +1

Silver Surfer

as Silver in Fictional Characters by Colours of the Rainbow

Score: +1

Red (Angry Birds)

as Red in Fictional Characters by Colours of the Rainbow

Score: +3

Beast Boy

as Green in Fictional Characters by Colours of the Rainbow

Score: +1