I doubt there's stealth finishers, as it would be incredibly hard to 1HKO with hands. The H2H finishers only work because they're flurried, vicious, and final, rather than the equivalent of *CHK CHK, BOOM*
Um.. no. You're right that there aren't any stealth finishers currently, but you're wrong about everything else.
1) it's really not that hard to KO someone, especially if you svckerpunch them
2) a choke is a simple move, easy to implement in first person, means the victim has no chance to make any noise and is easily lethal or non lethal at the user's discretion.
..Not to mention the fact that TES lore apparently has people doing all sorts of crazy unrealistic [censored] bare handed.