There are certain Rock bands that I really dig a lot. I wont make a list because that's not the point really.
Having said that, If I were put on an Island and could only record one set of styles, it would be soul Music. That's a huge term that covers a lot of ground but I'm talkin' old school. No Machines, a great band, "large please, like 12 or 14 folks, singers,horns percussion etc.}People who are making music because it's just who they are..
Yes, R&B, SOUL,, MOTOWN,,BLUES,,FUNK,,JAZZ, all the root's based forms of music. This,imntlbho, is why Rock music gets to exists at all so,............
FWIW, I don't understand why you put R&B and Bubblegum together. I guess lately, what passes for R&B is some sort of bad joke but, I put a lot more rock in the Bubblegum category.
my 2 cents.....................