You need to define the operation better. Modulating? Three phase or single phase? Quarter turn or multiturn? New valve or retrofit? Valve type and size? Ambient conditions? Analog position and feedback?
I strongly recommend a consult with a couple of good local suppliers.
I've had good luck with Rotork. For precise control you can't beat Rexa. Auma is big in Canda. RCS is low cost. I've had issues with Limitorque. I'm not sure which of these have comm protocols.