Grey Jedi/force-user vs Jedi vs Sith

Hey guys, I know grey Jedi’s are a topic of controversy but I’m curious about something.

Disclaimer: I may also be wrong in calling them ‘Grey Jedi’. I am more-so talking about a force user who uses and balances both the light and dark side of the force. They do not necessarily need to be good or evil, but potentially neutral if that’s a thing? For the sake of this post, I will say ‘grey force user’.

I’m aware that some interpret the dark side as a metaphor for evil, corruption or even drugs. I also know a lot of people say that grey force users are stupid because they don’t deal with the ramifications of using the dark side. For now, I just want to put this aside when discussing this.

I am purely curious about whether, based on the information surrounding them in canon if there is information, a grey force user would/could be more powerful than the Sith and the Jedi?

Or because they do not commit to one side, would they be unable to unleash as much power as a Jedi or Sith making them weaker?

Sorry for the long post, thanks guys!

Edit: I did not know that dark side is unbalanced and light side is balanced. Still have a bit of learning to do clearly! I was confused because of Mace Windu, any explanation of that would be greatly appreciated.