Battlecast/Mecha Kogmaw
Mortar - R
Battleship movie - slow
Laser
Bigger projectile
Gentleman Trundle
slicked back greasy hair, and tuxedo, cane for mace?
Jurassic Kha'zix
Hillbilly/Prospector Teemo
Stripped down Blitzcrank (see inside parts)
Boxer Vi
More Gadgety Caitlyn (I know she's already steampunk, but like Vi and Jayce are just way more... advanced technology wise she needs something that fits)
Tank Corki
Queen of Blades Evelynn Rip off from Starcraft I know... but her abilities seem like they would really fit that type of model