Wheeljack w/Wheeljack and Scientist Kreons (Scientist should be Jamie from Mythbusters)
Arcee (Ford Thunderbird) w/Arcee and Car Enthusiast Kreons
Blurr w/Blurr and Rich Guy Kreons (Bugatti Veyron)
Kup w/Kup and Veteran Kreons
Rodimus w/Rodimus and Customizer Kreons
Lugnut w/Lugnut, Pilot and Co-pilot Kreons
Bludgeon w/Tanker and Bludgeon Kreons
Slipstream w/Slipstream and Air Show Girl Kreons
Ironhide w/Ironhide and Security Guard Kreons
Hound w/Hound and Outdoorsman Kreons

 

Don't forget Perceptor w/Perceptor and Scientist Assistant (that looks like Adam)  

 

Knew I was forgetting something.......

Two gestalts:
Defensor:
Hot Zone with Fireman, Hot Zone, and Torso/Head to Defensor Kreons
Streetwise/star with Policeman, StreetX and Defensor Leg Kreons
Groove with Policeman, Groove, and Defensor Leg Kreons
Blades with Police Pilot, Blades (new bit: Rotors on back), and Defensor Arm Kreons
First Aid with EMT, First Aid and Defensor Arm Kreons

Bruticus:
Onslaught with Gunner, Onslaught, and Torso/Head to Bruticus Kreons
Swindle with Merchant, Swindle and Bruticus Leg Kreons
Brawl with Tanker, Brawl and Bruticus Leg Kreons
Vortex with Interrogator, Vortex, and Bruticus Arm Kreons
Blast Off with Pilot, Blast Off, and Bruticus Arm Kreons

The gestalts would be large Kreons, either each piece being the size of a normal Kreon. Each bit could hold that part's accessories on it, with the combined form mimicking the G1 Gestalt.

 

for the Wheeljack/Jamie Hynneman idea...you should automatically work for Hasbro now

 

Actually, I should change it to be Wheeljack/Adam and Perceptor/Jamie.

 

I think wheeljack should be with Jamie because TFA Wheeljack (Unintentially) looks like Jamie.  

 

Personality-wise, the inverse is better. But have the heads mirror the other's human.