John de Lancie is 6'4" according to IMDB, same as Frakes.
There's no biographical data for Eric Menyuk, so use Riker as the yardstick.
James Cromwell at 6'7", but you've already excluded him.
Carel Struycken, 7 feet.
Tiny Ron, at 7 feet, may be the tallest on DS9.