I knew it ? I've heard so many soloed miced guitar tracks I can call it pretty reliably
It really is a bear, I totally get it
It's always a balance between brightness towards the center of the cone and darkness towards the edge - I generally use a single sm57 or e609/e906 right on the EDGE of the cone, and then listen, and move it out or in based on what im hearing, the rig, and also the player.
It's a balancing act and takes a ton of practice and repetition
I would keep messing with single mic placement like you are now, and then, after you get more comfortable, jump into the multiple mics thing. 421, 57/58, e906/609, royer 121, they all work great combined together. It really opens up a whole new world - but it's really really important to get the single mic thing "down" first, before you start adding more variables.
It's such a great tone to begin with though, thanks to your rig and playing and Wayne's OD, that you can probably "get away" with a lot ?