I have grafted sweet cherry to sour cherry, then grafted adara plum to the sweet cherry, and European plum to the adara plum. I also do the reverse, and all have long term compatibility.
A friend of mine told me that she tried chip budding Euro plum to Adara stem and then grafted the Adara to the Montmorency sour cherry and were quite compatible in just one season. We haven’t experimented with Evans.
The key is that a 4"-5" long Adara interstem is needed to reduce compatibility issues between the ultimate scion and stock.
I have dormant adara scions still available if you want to try.
I have experimented with Pluerry as interstem, also the Nadia Cherry, but they die out after one season when grafted to sour cherry, but not on sweet cherry.