User blog comment:The Ultimate Doomer/Trying out the best soundfonts/MIDI synths for DOOM music/@comment-86.190.107.160-20160123131312

Roland Edirol Hyper Canvas sounds very close to what they were originally going for. Alternatively if you want a standard soundfont for it, Musyng Kite is a good all-rounder (but is 1GB in size).