Suggestions by @smeehee9916

Kyle Pepi

as Jamie Wilkerson in Malcolm in The Middle (1990-1996)

Score: +2

Ryan Pepi

as Jamie Wilkerson in Malcolm in The Middle (1990-1996)

Score: +1

Jack McMullen

as Sirius Black in Harry Potter (HBO Max Series)

Score: -24

Caitlin Blackwood

as Lily Potter in Harry Potter (HBO Max Series)

Score: -4

Steve Coogan

as Garrick Olivander in Harry Potter (HBO Max Series)

Score: -10

Annabelle Apsion

as Molly Weasley in Harry Potter (HBO Max Series)

Score: -23

Mark Benton

as Hagrid in Harry Potter (HBO Max Series)

Score: -15

Helen George

as Aunt Petunia in Harry Potter (HBO Max Series)

Score: -33

Naveed Choudhry

as Jesus in The Bible

Score: -8

Tony Randall

as Actors in The Most Funny People

Score: +1

Dick Van Dyke

as Mike Brady in The Brady Bunch (1959-1964)

Score: +1

Doris Day

as Carol Brady in The Brady Bunch (1959-1964)

Score: +1

Gina Gillespie

as Cindy Brady in The Brady Bunch (1959-1964)

Score: +1

Keith Thibodeaux

as Bobby Brady in The Brady Bunch (1959-1964)

Score: +1

Mimi Gibson

as Jan Brady in The Brady Bunch (1959-1964)

Score: +1

Kevin Corcoran

as Peter Brady in The Brady Bunch (1959-1964)

Score: +1

Hayley Mills

as Marcia Brady in The Brady Bunch (1959-1964)

Score: +1

Johnny Crawford

as Greg Brady in The Brady Bunch (1959-1964)

Score: +1

Jack Lemmon

as Mike Brady in The Brady Bunch (1959-1964)

Score: +1

Cloris Leachman

as Carol Brady in The Brady Bunch (1959-1964)

Score: +2