Suggestions by @greygriscom

Peter Cullen

as Headmaster of Veni-Yan-Cari in Bone (Animated Series)

Score: +1

Jacob Tremblay

as Bartleby in Bone (Animated Series)

Score: +1

Nancy Cartwright

as Taneal in Bone (Animated Series)

Score: +1

Jonathan Banks

as Lucius Down in Bone (Animated Series)

Score: 0

Jonathan Banks

as Wendall in Bone (Animated Series)

Score: -1

Judy Greer

as Miz Possum in Bone (Animated Series)

Score: +1

Katee Sackhoff

as Miz Possum in Bone (Animated Series)

Score: +1

Keanu Reeves

as Veni-Yan-Cari in Bone (Animated Series)

Score: +2

Steve Blum

as Stinky in Bone (Animated Series)

Score: +1

Helen Mirren

as Rose Harvestar in Bone (Animated Series)

Score: +1

Benedict Cumberbatch

as The Great Red Dragon in Bone (Animated Series)

Score: +4

James Horan

as Euclid in Bone (Animated Series)

Score: +1

Paul Rudd

as Smiley Bone in Bone (Animated Series)

Score: +1

Liam Neeson

as Lord of the Locusts in Bone (Animated Series)

Score: -1

David Cross

as Smiley Bone in Bone (Animated Series)

Score: -1

Terrence 'T.C.' Carson

as Kingdok in Bone (Animated Series)

Score: 0

Sam Witwer

as Balsaad the River Dragon in Bone (Animated Series)

Score: +1

Carrie Coon

as Briar Harvestar in Bone (Animated Series)

Score: +1

Jeffrey Dean Morgan

as Phoney Bone in Bone (Animated Series)

Score: -4

Jeffery Wright

as Roque Ja in Bone (Animated Series)

Score: 0