Just thought id do some research and revive this thread.
I went through my Vice City book and made a list of all the record companies that were mentioned in the song list, to see what posible music rights R* may have.
Here is the list, ill be back later with some bands from the early 90's that are owned by those companies. Here is the list. (just in the order i wrote them down in)
Atlantic recording corp
EMI music
Universal music group
Epic recoreds
Virgin records
Columbia records
RCA/BMG special products
ZTT records
Capitol records/ EMI-Capitol
Beggars Banquit
Chrysalis music group
Zomba music group
Atomic recording group
Beyond music
Sanctuary records
Island DEF JAM music
Warner Bros. Records inc
Unidisc music