Neons and ram shouldn't be a problem (the ram would take an interest but so long as the shrimp are a reasonable size you should be alright)
However the convicts...I'm gonna say probably wont be compatible with any shrimp.
The shark... never kept one but again, it'll probably see shrimp as food.
If the shrimp have ALOT of cover, who knows. But to be honest I think it would turn into a very expensive treat for the fish.
And you definitely wouldn't have any surviving shrimplets if they bred.