Just making modifications to Ultra Marginal's list:
Optimus Prime
Shockwave
Ultra Magnus
Scorponok or Black Zarak
Iron Fist
Dreadwing
A micromaster jet - Treadbolt
G2 Thundercracker
ThunderClash
G2 Megatron
A yellow Car guy - Leadfoot
Megaplex
Rattrap
machine Wars Starscream
Guy From Beastwars/beast Machines - Silverbolt
A cross between Machine Wars Cheetor and MumRah - Magmatron
Black Arachnia (Beast Machines)
SkyeBite
Orange Tang guy - Jhiaxus from a Beast Machine toy (Jetstorm, I think)
Hotshot
Outy Bellybutton guy Snowcat
Primus?
Alternators nemesis prime
Movie Bumblebee
Lugnut
Movie Devastator
PCC Dinoking
Movie Sentinel prime
Prime Knockout
Prime Predaking
Movie Teaser for 2014 Age of Extinction
Looking For: Wreckers Saga TPB Collection (with Requiem)