Without hearing the mix you're working on, my first guess is that you have not used EQ to place the different components of your mix in their own "space" in the mix. It's a subtle thing, but with something that has as wide of a range as an acoustic guitar, especially mic'd with a large diaphragm condenser, maybe a bit close-mic'd, you'll have guitar "everywhere" in the audio spectrum (i.e., frequency-wise). (When you used the phrase, sound stage, I think many here would think you're talking about the width/panning, i.e., "physical space" of the instrument, and not the frequency width.
With a sensitive mic like the TLM, you may want to roll off some upper end, or adjust the mic's position if it's getting too much of the finger-noise. If it's room noise/flutter-echo, then acoustic treatment can be important. Mic placement and the recording space is much more important with acoustic instruments. And, the mic choice can make your job easier or harder, so definitely try the SM57 - it may be all you need when the guitar is in a more supporting role.
So, first, the guitar is more like a cello than a violin, as its bottom frequencies share the same couple of strings of a bass guitar, so if you've already got a bass, or kick, stomp, whatever down there, you probably want to low-shelf some of the bottom out. Then, if you've got male vocals, well, you'll need to carve a little space for that. On and on. It's not a big carve out, just a couple dB, and probably a little wide. If you've got something else that's the predominant part here and there, like a vocal, or other solo instrument, they might need a dB or two boost when they're supposed to be more noticeable (use automation to start, or break the track up and apply "clip-gain"), Etc. Use the PAN control to place things where they're in the middle or to the sides, to suggest importance. Work on the static mix until you can hear each part on its own.
Good luck!