For VST’s, Superior Drummer 3 and East West’s Play. I use Play for all my strings, choirs, brass, bass bombs, sound effects, tons of stuff. I’ve got a subscription to their libraries and you can download whatever you want from it. Really good sounding stuff.
Absynth and Korg’s Triton are a couple others.
For regular plug-ins I stick with what I’m familiar with and know do exactly what I want, mostly Waves and Plug-in Alliance stuff, but far too many to start listing.