Some old Beast Wars sketches I've dug up and scanned.

Drawn in 1998:

Snarl

Powerpinch

Transmetal Terrorsaur

Scavenger

Transmetal Airazor

A rather skinny Optimal Optimus

Lio Convoy vs Galvatron

Drawn in 1999:

Dinobot vs Hardhead

Big Convoy

Ravage

Silverbolt and Blackarachnia

Airazor

Drawn in 2003:

Transmetal 2 Blackarachnia

Convobat vs Meglligator

Drawn in 2004:

Unicron's Four Horsemen