I've definitely considered it.30-30 lever gun?
Welp this is a very complex question.
For “versatility” I would start with.... name your favorite .308 bolt gun, cut down as short as possible while maintaining the ballistic characteristics your looking for, and mount some type of 3xwhatever optic
Back that up with a glock 19 and lots of mags.
If we’re going single gun, fighting it out, you have the training to understand a gun fight, as basic as movement to contact, have drilled a lot with an AR type rifle, then my choice would be a 14.5 inch barrel with pinned and welded comp, OR an AR pistol, with a 12.5 inch and add comp, pick whatever upper and lower fits your budget (I like BCM for cost/quality ratios) and mount some type of high quality variable 1x8 optic.
Pick your poison, you could even run three guns!!!!
In the end it all comes down to your capabilities and what the mission you envision encountering. Think perceived problems/solutions.
Are you an ace with a long gun, pretty decent with pistol? Not good with either but pretty good with shotguns? I could go all day but I’ll simmer down now.