2S6 Tunguska
A couple of versions in the game, closer to Gepard or so though. This one is on everyone's list but it is a tough one
T-55 before AM1 model, T-54 idem & T-62 except MV
If you are dissatisfied with the originals, look in the old SPMBT Yahoo site into
Files > Player Graphics Modifications > Joe Rieger's Icons
Needs some sweat to be worked into the game but worth it!
BTR-80A/90
Done in the game, more or less. Tend to switch from -80 to -90M or Kilver, but that may be worth a try.
BRM-3
Done in-game: icons 1673 to 1677. Generally not attrubuted
125mm 2A45 AT-gun and more generally Artillery
Personnally started work on a new artillery icon for three-legged guns like D-30 and, well, 2A45
I'll keep it up