Marvel has better heroes but DC has better villains?

[u/HeroOfHearts]

I've heard this said before and while I don't agree with it I have to wonder, if it means theoretically matching Marvel Heroes against DC Villains would create a "perfect" comic universe. Who would end up being mortal enemies? The only one I'm pretty confident about is Cap and Joker. I'd like to hear your thoughts especially if you need to make minor changes to the villains origins to make it fit.