Zardnaar
Legend
Most of those are pretty weird, as are the slaadi and the elemental princes of evil. Even the stuff everyone liked was weird. (Even the drow art was edgier and more interesting, helping to weird up an EGG original.)
I'm not sure what was going on in the TSR UK offices, but they were clearly having a good time.
Cocaine maybe. Or mushy peas having an effect on thought processes.