I'm going to make two lists because I kinda set them differently depending on if we're talking CGI renderings in the actual movies or toy versions of them... so I'm going to do on screen first then toy. Protoform Optimus Prime... we don't see much of him but it seemed like the other four Autobots used the same CGI model and other than the head there isn't much of an Optimus Prime look to this one. I hate it. Evasion Mode Optimus Prime. I keep wanting to call him Ultra Magnus because he looks like one of those white Optimus Prime repaints. Other than his color scheme I actually like this design and this is a big part of why I'm doing a second list for toys. Knight Optimus Prime... he looks like he has boobs... I think they're actually suppose to resemble pecks but they just look like boobs. I'm not against him not having windows which you'll see in the other list, I just don't like Optimus having boobs. Original Trilogy Optimus Prime. One of the few designs from the movies I actually like. It does still have the issue of looking overly complex which is why it's not at the top of my list anymore but it's still a pretty decent design. I'm going to give honorable mentions to Jet Prime and Trailer Prime here but the base Optimus stays basically the same for all three movies not including those power ups. Bumblebee Optimus Prime, this is like a perfect blend of G1 and Movie... it could go a little more on the movie direction especially in the face because I think he looks half rendered without that detail but the over all design is way more solid and I love that. Now regarding the toys... Protoform Optimus Prime looks so much better in G1 colors. Now it's clearly Optimus Prime. It's amazing what a difference a paint job can make on a figure. I'm still putting this kinda low because of the alternate mode which is suppose to be an asteroid but the toy makes it also kind of a truck so it looks like a weird combination of both as if it doesn't know what it wants to be. Knight Optimus Prime... the toy kinda makes his chest look more flat than it does in the movie which I like but he still ranks kinda low because he's a shell former. Original Trilogy Optimus Prime again I actually like this design he just got knocked down a bit because the others were better. And again Jetfire and the Butterfly are honorable mentions because I'm just looking at the base robot who doesn't really change that much between the three movies. The toys change a lot but they're all plastic representations of the same design. Evasion Mode Optimus Prime... this shot up the list a lot all thanks to a G1 paint job. This was my favorite Movie Optimus Prime until... Bumblebee movie Optimus Prime... now if only they could give us something with the solid apperence of this Optimus and the realistic detail of Evasion Mode Optimus it would be perfect.