man, nobody has said androcell yet?
amazing music, somewhat in the vein of ott's (possibly one of the closest to ott's style), but noone really makes music exactly like him.
he is also coming out with a new album soon
in genral here are my dub recommendations, some similar to ott, some not:
kukan-dub-lagan (no need for a discussion on the merits of his music here, ok pavel?)
omnimotion is dubby, more like stressassassin than ott
as good as bluetech is, i find him nothing like ott
obviously get hallucinogen in dub if you like ott
pitch black is much more uptempo at times, but amazing unique dub-unfluenced music too
talisman compilation from interchill is the fucking ultimate dub compilation with an ott song on it actually
Shakatura sometimes puts out dubby songs, but rarely
now for really good psy-dub that i find nothing like ott:
gaudi
neil sparkes
waterjuice
oliver jones at times (out with an album on iboga soon)
kick bong
red seal
bill laswell obviously, although not all of his stuff has something to do with dub
there is also this dude by the name of marley something or other you might check out