Time to rebuild?

You dont need to rebuild that thing.
Your compression numbers are fine.
Throw out those leak results. Whoever was doing it either had no clue, or was trying to sell you a job.
Assuming both intake and exhaust valves were completely shot, there would still be no way for them to introduce raw fuel into the crankcase.
The only way for that to happen is past the rings. You would almost need to have a cylinder completely dead with zero fire to see a notable amount of fuel in the oil.
I am thinking your problem is simple and external.
Example, a malfunctioning choke pull-off that is washing the motor down with fuel at a point before piston and ring expansion really gets things to seal up.
A float adjusted just a bit too high will wash the motor under certain circumstances..hard braking or turning.
I have also seen cars and that will boil over fuel after they are shut down and underhood temp rises momentarily.
Do you have to crank the engine excessively and open the throttle to get it to start after it has been sitting hot for ten minutes?
Cover all the external bases before you go ripping into an otherwise sound engine.