The thread says G1 tanks, so that wouldn't count. Yeah, I know Beast Wars continues on from the same continuity as G1, but so does G2 and nobody's included any G2 tanks here either (e.g. Megatron, Archforce etc.). AFAIK the thread stipulates only G1. Another BW tank would also be Takotank and of course, Megastorm.

Other G1 tanks...
+ Impactor.
+ Flame. The evil Autobot scientist, not the Autobot Motorvator.
+ Emirate Xaaron. It has been explicitly stated that his alt mode is a "small combat tank", but whether or not it fits Oilspill's criteria of a "tank" (i.e. has treads or a gun barrel etc.) is unverifiable since Xaaron _never_ transformed!
+ Treds