When recording on stage XY is really the only way to go otherwise by running ORTF or DIN you get a hole in the middle and the infamous ping-pong affect when instruments or vocal wander left to right.
Otherwise, off stage you can take a pick of what ever confiqurations floats your boat, but my lord don't ever use DIN on stage and I would only use ORTF on stage when recording a deep stage full of instrument like an orchestra. And, in those cases I would blend a split omni in with the ORTF.
I really can't come up with any other taper positioning options other than the ones I have already stated. However, I'm not sure why you would have to stand infront on the stage and your mics if you ran on stage. When I do so, I bring enough cable to run my system off to the sides, where I pull up a chair and relax.
Some have suggested that you position your mics right in front of the stacks and record them. By doing so you are basically recording the signal coming from the board and being played back through a PA. In other words, now you have a recording of a soundbaord coming through compromised speakers. Sure it will eleminate the crowd but it introduces a series of other issues that don't tickle my ear.
If you decide to record back by the board, which you seem to favor for comfort reasons, you will never be able to overcome the problems you have experienced so far. Alway remember the golden rules, "you can't polish a turd" and "location, location, location"! By remembering these two simple concepts it will direct you in the right direction to get the best possible recording.
In closing I will leave you with one last saying regarding compromising your options, "If you like the rain don't complain about the mud"! In other words, if comfort is the primary factor directing your taping options then accept the sonic hand you have dealt yourself.
Enjoy and keep us updated as to your outcome.
Ray