Unpopular opinion but technically correct answer: you can fly any plane without a pilots license. In fact I just saw a Quora question with this exact question and the answer came from a 60 year old pilot that has been flying without a license for 30 years. If you never fly out of a major airport where an FAA inspector can ramp check you, who will ever find out? Please don’t do this.
I'm a private pilot. This is basically correct. If your airport is small and you never get in trouble with ATC or have an emergency situation, you will probably not get caught. However, if you do get caught, it is a criminal charge with (IIRC) up to $250,000 fine and 6 years prison time. Or worse, you overestimate your ability and die/kill people. I wouldn't take that risk. If you want to fly a lot, get a license. If…
What?! That's incredible. If more people were trying to get their licenses I bet the ACLU would fix that nonsensical bigotry and embarrass the FAA in court.