>>29642877Type overlap is fine as long as both Pokemon play different enough roles, or their resistances are separate enough. Try not to sweat it, just use the Pokemon you like the most, and enjoy.
It's not even gonna matter that much considering a main game playthrough's gonna be easy as hell either way.
Or if it makes you feel better, you could be one of those people who use a rotating team, so that you can have an excuse to use multiple of the same type. You just have to not use matching types at the same time.