I'm very selective about the plugins I use, but someone else might not find them as creme de la creme as I do. For what it's worth, the short list of plugs I use is:
PSP Audioware: MasterQ, Vintage Warmer 2 (all their plugs are excellent though)
Roger Nichols Digital: Equim, Finis, Firium, Neodynium, Inspector XL
Steve Massey: CT4, L2007, VT3, Tape Head (these are ProTools only)
Sonalksis: SV-315 compressor
I also use a few plugs that come with Digital Performer and Pro Tools. In DP I like
the Masterworks EQ, and in ProTools I get some use out of the dynamics bundle and some of the Bomb Factory stuff. Although I don't consider Bomb Factory to be creme de la creme at this point.
I use only native plugs, so I can't speak to UAD,
Duende, Liquid Mix or any of those hardware solutions.