What about a couple of small morse cables, then you could have a pair of t levers like a jet throttle?
On a more serious note, good and compact and simple, with feel to ease in or out. Once set the lever position will confirm full engagement?
Air actuators would really need sliding connections with compression springs to ensure no damage to internals during use. Sure you can reduce flow and/or pressure but it's still remote and out of sight installed.
KIS?
Steve