I'm not the biggest Vince G fan but, I have a couple for nostalgia. All of the others you list are heavily represented. Also, a few others like:
Rosemary Clooney
Gene Autry
Jimmy Wakely
Dean Martin
Then I have to have a variety of orchestra/philharmonic and choir pieces.
My wife and I always debate about the American vs European versions of Away in a Manger (she's Belgian) so I have both. I also need to have the German version of Silent Night on the list.