A Minifigs gnoll

 

Here's an old Minifigs gnoll. This range is clearly based on the Tom Wham illustration from the Basic D&D set:

And the Wham drawing is based on Dave Sutherland's illustration in the Monster Manual, though the former seems to have lost some of the more hyena-ish elements along the way:

A later range of Minfigs gnolls (World of Greyhawk, below) make the creatures more hyena-like, but they still retain some similarities to the original range - especially in stature. 

I'll be fielding the two types together in games: it would be odd to expect creatures of chaos (which is what gnolls are in early D&D) to lack variety!