EVERYTHING John said.

Also look here if on a tight budget and only want GM stuff right now, and you aren't in market for $$$ Kontakt, Komplete, Sampletank, Omnisynth, UVI, then I would also suggest for $25 you can get a LOT of sounds, a lot of GOOD sounds in multiple formats for same price (i.e., you can get one or more for same $25).

http://www.dskmusic.com/high-quality-instruments/

Not only that but in the additional (bonus) 950 sounds there is a dedicated GM sound set you could use in Synthfont VST. And all of the SF2's/SFZ’s can be using in Sforzando, and tools like Synthfont VST or Coolsoft Virtual MIDI synth (which acts not like a VSTi plugin - it acts like external MIDI Hardware).

There is also a link here to another FREE now multi-timbral soundfont player (like Synthfont VST) by rgc: Audio called SFz+ see this thread

http://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=476009&Searchpage=1&Main=69369&Words=SFZ%2B+triangle&Search=true#Post476009

And here’s the link (it’s in Spanish SFz+ link is towards bottom and still active)

https://selecciondefinitiva.com/2018/04/05/triangle-i-ii-sfz-y-square-de-cakewalk-rgc-audio-guardados/


Good Luck
Larry

Win10Pro,i9,64GB,2TBSSD+20TBHDDs,1080TI,BIAB'24,Scarlett18i8,Montage7,Fusion 8HD,QS8,Integra7,XV5080,QSR,SC-8850,SPLAT,FL21&others,Komp.14,IK suite&others, just a guitar player-AXE FX III &FM9T, FishmanTP, MIDIGuitar2, GK2/3'sw/GI20