Bill’s right on the money with the Nova/Spencer shell, you can make a lot happen without really learning how to play Spencer (who is a bit more complicated than people give him credit for), thus allowing you to win more easily. Of course your anti-Doom bias is showing as usual; Nova/Spencer/Doom is probably 2nd to Strange since it gives the team a great assist and still allows you to kill off of hard tags pretty reliably. Doom isn’t exactly easy to play, but it’s because he’s unorthodox, not because he’s super-high execution imo.
An even derpier version is Nova/Frank/whoever IMO. I guess Sent or Doom would be easiest.
That said, I don’t recommend learning a team that’s low execution just to win. Don’t play just to win, play to learn and improve your game.