I feel horribly shallow about this, but I can't help thinking I'd ship Megatron/Lugnut if Lugnut wasn't so damned ugly and bulky.

As it stands, I'll just have to go with the fandom favorite of Blitzwing/Blitzwing/Blitzwing with a bit of fluffy Prowl/Bulkhead on the side. God, I love Blitzwing.