If you want to stick to Pots-style chars, your best bet for a balance tour are only chars by Pots himself, Jmp, DeathScythe, Jesuszilla and KarmaCharizard. Their works are based on available source data and their coding skills are noteworthy. While I do aware there are many other Pots-copycats, their works or edits tend to be sloppy and none of their works truly stand out so it's better to stay away from them for your purpose.
For more input: http://mugenguild.com/forum/topics/an-explainer-pots-style-187886.0.html

All of infinites and races chars aren't overpowered, they can still get their ass kicked by normal pots chars

So, would you consider MvC3 level zoning balanced in CvS2? Because that's basically what Infinite's Dormammu would be when lumped with standard PotS characters. Hell, Infinite decided to make Stalker Flare air unblockable for no reasons even though it wasn't even air unblockable in Mahvul of all things.

Edit: And for the record, I'm only using Dormammu as an example, but you can apply similar reasoning with other PotS copycats who don't exactly have internalized balance in mind.

There's enough Infinite/Race stuff out there you could just make a separate comp for those.

Infinite, Race, Falcon Rapper etc characters simply put are not built the same as traditional pots style characters. they aren't something you can just "tweak" and throw in and expect to have a cohesive "competitive" roster. Beyond frame data and velocities and all that shit, there is just basic design choices that would give them unfair advantages. Like the addition of mvc like chains, random moves like fireballs, and instant cancellable supers off every normal or special. Not to mention the cornucopia of bugs that they have. In fact throwing all these "traditional" characters together themselves won't be cohesive considering PoTS own works had drastic changes in quality later on.

If you wanted a "cohesive" roster what you would need to do is make a fullgame. That means building all these characters from scratch to have a competitively balanced and viable system. If you can't do that. Your best bet is to just use only one set of characters by one author.

Or you can wait a couple years for when Jmorphman's fullgame is finally a thing.

Well, I am working in a fully balanced mugen.

With this mechanics:
6 buttons
Chain combo,
Launcher,
aerial combo
spot dodge
power charge
MVC imput style Hypers,
TAG SYSTEM:
assist,
character change
and delayed hyper combos,


I am using a vast selection of characters and recoding some stuff that needs to be recoded,
I will upload a Nero video one of this days and an update