Suggestions by @josetheyeet

Frank Welker

as Dragon in Beowulf

Score: +2

Natasha Henstridge

as Grendel's Mother in Beowulf

Score: +4

Douglas Tait

as Grendel in Beowulf

Score: 0

Tom Cruise

as Unferth in Beowulf

Score: +1

Daphne Zuniga

as Wealhtheow in Beowulf

Score: +1

Garry Chalk

as Hrothgar in Beowulf

Score: +1

Elijah Wood

as Wiglaf in Beowulf

Score: +1

Bruce Campbell

as Old Beowulf in Beowulf

Score: +1

Will Kemp

as Beowulf in Beowulf

Score: +5