Having done the Autobots liust, now I'll go for the Deceps.
10. Skywarp
9. Thundercracker
Throwing these two in because they each participated in the events of both WFC and Exodus. Though, I admit that they aren't necessarily needed.
8. Brawl
A one-bot powerhouse of destruction and violence, coupled with a high-enough intelligence fit for a ground commander, makes Brawl a valuable candidate to be carried over from the games into the show.
7. Lugnut
Though he had a minor role in the book, the fact that he at least got a mentioning of being a part of the Nemesis's crewmembers (along with such big tier players as Starscream and Soundwave) bumps up his worthiness.
6. Frenzy
5. Rumble
4. Ravage
Like Skywarp and Thundercracker, these guys aren't really necessary, but man would they be awesome to see. After all, Frenzy and Rumble were part fo the Soundwave boss battle in the game, and Laserbeak has already made it into the show. Plus, bringing these three in could help enhance Soundwave's characterization as a master of stealth and spying operations, since these guys are his main tools used in his undercover work.
3. Barricade
Again, not really a major character ,but he's got a Prime design in the MMO, and Steven Blum is already in the show, so, hey, why not?
2. Trypticon
Okay, so he's technically already in the show, but come on! He's more than just a Nemesis class warship! Get him in his Saurian Mode and let him run rampant already! Megatron, your ship is a GIANT DINOSAUR, yet you fail to use that trump card! Is it too energy inefficient to use him or something? If so, TELL US THAT! If not, USE HIM!
1. Shockwave
The true second-in-command of the Decepticons. The one who created the combiner process and thus created the Devastators and Bruticus Maximus. The one who perfected the use of Dark Energon for the Decepticon armies. The one who grant LIFE to Trypticon! GIVE THIS GUY HIS TIME TO SHINE! HE DESERVES IT!