Meaning as vanilla/neutral as you can get from the stock packages and configurations.
- Ubuntu has become a slop of Canonical choices and ads for services everywhere.
- Mint does a lot of non-standard stuff, which is fine if you want to use Cinnamon.
- PopOS has a bunch of custom tooling
And so on.
If OP just wants to get on board at a base level without a HUGE amount of edge-cases or one-off customizations, Fedora is the way to go.