A Lot of those Bigger Cats are as many of Our Fellow Pet Talkers have stated very gentle.
Moose,Ragnar and RB Mr Fluffy and Rb Tiger were very good with the Smaller Cats.
And RB Mr Scratchy kept Scrappy 2 alive,with his warmth,and letting her eat first last year,even with the steak.
I would urge you to give the Big Fellow a chnace,and your Girl Kitten will have a Teddy Bear as a Friend.