I never kept the Cherry Shrimps with fish, so i cannot tell you much, but i keep the Amano Shrimps with Corydoras & Tetras, without any problems. I used to keep the Amano's in a planted tank & i had a Clown Loach there. I never saw any aggression from the Loach.
If you plan to add some Shrimps, i would go for Amano Shrimps, as they are quite hardy & tolerate water conditions. I don't think that the smaller type of shrimps, like Cherries & Tiger would be at their best with the Rams & they will be hiding alot.
If you add the Shrimps, just buy 2 & see how it will go & if you see that everything works well, than add some others. If you are planning to breed the Rams, than i would suggest to leave them on their own, without any other fish or shrimps.
You can add an Apple Snail as cleaning crew, buy you have to remove it, if the Rams spawn.
Please treat Corydoras as community inhabitants & not as scavengers.

