On the Ranger/Rogue Hybrid ... I had looked into it the first time, and it's possible to pick encounters (and dailies) for each such that nearly all of them are either free actions, minor actions or immediate actions (reaction/interupt). It requires the beast ranger option (which gives the rogue a nice flanking partner while you are at it) but you can basically get yourself 3 chances per encounter to get both sneak attack and hunter's quarry off per turn, not counting the dailies. Didn't try it all the way up to 30 though, so it might require giving up higher level powers to do so (I think it already did involved doing so at lower levels, although encounter powers at 3 and 7 aren't that far apart powerwise).