skywarp is a great choice but they took him out way to easilly same with thundercracker.getting hit by a truck is going to damage you beond repair come on
Thats a tough call...Optimus Prime and Megatron for sure and definitely Grimlock would be one as well. Omega Supreme is a great one too. I just got the Diaclone Omega Supreme. It was made by a company called Toy Box. Got to love those Diaclones
I'd have to go with Devastator. As a toy, this was the COOLEST non-Star Wars toy EVAR! I got the gift-set for my 10th b-day, and LOVED every bit of that. Even more fun and original than Optimus Prime. ;-p
They're all great! All the character bio's were tweaked to near perfection to where I either loved (or hated) all of them. The greatest (if Megatron & Optimus Prime had a vote) would have to be Vector Sigma. After all he did give life to all of the transformers.