Suggestions by @sephirothscout

Anndi McAfee

as Vivian / Koopie Koo in What if Paper Mario TTYD had voice acting

Score: +1

Tress MacNeille

as Hooktail / Bedlam / Additional Voices in What if Paper Mario TTYD had voice acting

Score: +1

Thomas Dekker

as Koops in What if Paper Mario TTYD had voice acting

Score: 0

Jim Cummings

as Grodus / Koopley / Additional voices in What if Paper Mario TTYD had voice acting

Score: +1

Barry Dennen

as Lord Crump in What if Paper Mario TTYD had voice acting

Score: +1

Jennifer Hale

as Goombella in What if Paper Mario TTYD had voice acting

Score: +1

Charles Martinet

as Mario in What if Paper Mario TTYD had voice acting

Score: +2

Nathan Lane

as Mr. Mushnik in Little Shop of Horrors

Score: 0

Christopher Lloyd

as Professor Frankly in Paper Mario: The Thousand Year Door

Score: +2

Jennifer Hale

as Goombella in Paper Mario: The Thousand Year Door

Score: +1

Kath Soucie

as Yoshi in Paper Mario: The Thousand Year Door

Score: +1

Tim Curry

as Bobbery in Paper Mario: The Thousand Year Door

Score: +1

Jason Alexander

as Mr. Mushnik in Little Shop of Horrors

Score: -1

Scott Wozniak

as Seymour Krelborn in Little Shop of Horrors

Score: +2