I love these sorts of threads. “Which movie had the coolest stasis chambers?” “Which sci-fi automatic doors make the coolest noise?”
The carbon-freezing chamber from The Empire Strikes Back, though not especially cool in and of itself, should be awarded bonus points for the coolness of its end product.
The space-crystals from Lifeforce were pretty cool as I recall, although that may have had something to do with the fact that one contained a nude woman.
Perhaps technically not a “stasis chamber” by the strict definition of the term, but the zombie canisters from Return of the Living Dead were pretty cool. “Leak?! Hell, these things were made by the U.S. Army Corps of Engineers!” I always wondered if the little glass window on the end was there so you could tell if the zombie was still inert, or so you could check whether you were opening it from the head end or the butt end.
Speaking of undead stasis chambers, the movie Underworld wasn’t good for much, but it did feature a spiffy floor-mounted technocasket for king vampire Bill Nighy.