I think that Grubba99 is looking for a more technical and specific answer; in fact he nailed the problem when he wrote "There's a bassist covering the bass, theres a guitarist for chords and theres a guitarist for lead (mainly melody, or whatever)
WHERE DOES THAT LEAVE ME?
WHAT IS MY JOB IN THE BAND?"

Well,I think that the trickiest part is the interaction with the rhytm guitar, because in a band a keyboardist is playing chords, most of the time, and only occasionally adding nice riffs or fills or solo's here and there...
So the trick is: you should always avoid to play the same chords with the same voicings in the same frequency range as the rhytm guitarist, because this would lead to the so called "sonic mud". Of course this implies a lot of work beforehand: you could ask the guitarist to show you how he plays the chords in a given song, and then try to play the same chords with different inversions, maybe one octave above or below him, until you both are satisfied with the result.
With the lead guitar things are much simpler: you just have to discuss with him beforehand which solos will be taken by whom.
Hope I answered at least in part your question and.... good luck!