I've never been able to get into Oxbow for whatever reason. I looked up some Don Martin Three after your post, and they are okay but I don't really care for the vocals most of the time, although I do catch what you mean about it appearing to follow much the same formula. To me, though, they're just one of those bands that make me want to listen to At the Drive-In instead. I have a weird issue with music sometimes, if I like a band that sounds a certain way, hearing other bands that sound like that (or seem to be trying), grates on my patience.
Since I just got back into my "noise rock" phase, or whatever it should be called, I've also started listening to Shellac again.