Assuming this is about rifle cartridges.
For me, the Lee RAM prime or the RCBS ram prime are the most overlooked precision priming tools that I've used when it comes to controlled and consistent seating depth. There is no need to full stroke the handle, just raise the handle enough for the primer seating cup to go below the shellholder, place a primer and seat. Great economy of motion, and zero risk of primer flip.
Pair it with a Lee C-press, and it's a dedicated priming station. Cheap enough to have two dedicated setups.
I have a couple of RCBS bench primers, one is mounted so the handle travel is limited on the upstroke of the ram which controls the seating depth, and although they work very well, the ram primes are still my favourite.
When I was new to reloading, it was taboo to touch primers with your fingers. Utter rubbish, I've found [ try to de-activate live primers, it takes a lot more than touching], unless you've submerged both hands in a tub of used engine oil.