I simply want opinions on what good match ups would be between Greek Heroes. Such as:
- Hercules vs Achilles
- Theseus vs Perseus
- Periclymenus vs Odysseus
- Etc.
I am well versed in my mythology and am fully aware that only some of these heroes lived at the same time as each other, this is merely hypothetical speculation on who would win and why.

Do you mean as one of the argonauts or any hero in general?

Any hero in general

Okay what about Achilles vs Thesius

A nearly invulnerable juggernaut with immense skill against a super ferocious warrior? Sounds good, but I would have no idea how that fight would go, I'm not super familiar with what Theseus is capable of.