Maybe I missed something, but there is an interesting list on Spotify, apparently compiled by Queen, of Freddie's favourite tracks, ranging from Dusty Springfield through George Michael and Prince, ending with a couple of opera classics. Not sure if it was discussed before, but the playlist seems very much like him!
Lee and Thor, it would be great if you could contribute here. Freddie's thoughts on "Relax" by Frankie? Is there anything missing? Maybe "I Feel Love" by Donna Summer??
It's surprising a compilation CD hasn't been released along these lines. Bowie has a few, and other lesser artist's have curated similar. Perhaps the licencing doesn't add up for expected sales.