I'd bump RiD Prime to #1 for personal reasons (literally got me back into the series after about a decade away!) but I also just freaking love its design regardless. Add in that he has regular, super, and Omega Prime modes and the thing had the kid in me freaking out.
I'd also give Cybertron Prime extra points for the absurdity of being able to turn into a FLYING fire engine!
I'd also take out the MP mold and elevate Smolder to the regular list, if only so the cons get some representation (no, Sentinel doesn't really count for that!)
I'd take Sentinel out anyway, nothing against it, just I don't have a lick of experience with the full sized mamma jamma, just one of the smaller cyberverse versions, Anyway, I'd put either g1 Hot Spot or TR Hot Spot in there. g1, I appreciated that he incorporated Defensor's head right into the toy, so unlike most Scramble Cityers you couldn't lose it, TR of course has 30 years or so of improved engineering on his side but none of them had losable heads that time around.
I'd probably put Energon Inferno in as a honorable mention, too. Good figure, but some nitpicky flaws keep him from doing better.