Lisa Simpson

Uncle Iroh, but post general/fire lord.

MegaMind.

Captain planet.

Maybe we'd finally actually do something about climate change and for an extra special bonus we get to see him kick the shit out of the likes of the Koch's and whatever demon spawn runs Nestle.

Side note: mufasa is my namesake! I'm just so super creative and ran it backwards lol

Lex Luthor.

Sure, he wants to kill Superman, that's not the best political stance, but other than that he'll basically just focus on fixing everything else that slows society down in order to have a society that's better at killing Superman.

Plus it's not like he's successful at killing Superman. So really it's a win-win.

Hermes Conrad. He's got a level head and knows his way around a bureaucracy.

Hobbes

Professor X. He's already responsible with even more power, and this way people would choose to listen to him.

Daria

Dr.Doom. He's got experience and a pretty good track record all things considered.

Scrooge McDuck (Duck Tales version). Dude knows how to manage people and balance a budget. Sure he might occasionally get obsessed with some treasure in the middle east but that's no different than most presidents.

Winnie the Pooh for the irony

You know, cause they keep calling some other head of State that

King Julien. No one comes close.

Nausicaä of the Valley of the Wind

E: Always forget the diacritical marks

Archer.

Mallory Archer.

I'm going to cheat a little and say Captain Kirk from Star Trek TAS

Nice try big politics! You wont get my opinion!

Joking, I'd vote for the roadrunner.

@Melatonin Since you lot can't be trusted I'm calling in Princess Twilight Sparkle to take you back to a monarchy.

Just for the comedy that might ensue from how horrible of a president he'd be, my vote is Principal Dr. Cinnamon J. Scudworth with Buttlertron as his VP.

Either that, or if possible, as a slightly more serious answer, why not have someone like an actual scientist like Professor Professor from The Secret Show with Name Changed Daily as the VP ( or vice versa )? They already run a not-so-secret spy organization, so why not?

William Murderface

Satsuki Kiryuin, fuck it she might get our shit together.

Kodos

Jessica Rabbit.

All those "women can't be president" douchebags would shut the fuck up and start becoming "nice guys" which would be cringy but at least it would get them to stop sabotaging the rest of us.

The Lorax

Clark Kent.

Princess Caroline. She can make deals, is passionate about her work but also her family. She would make this country function and function well and she'd never stop till it was done.

Bugs Bunny.

Bender Bending Rodríguez