I was in the same situation as you looking for lenses with about $2000 to spend.... got the 85 1.2 and don't regret it. I've used the 50 1.8, 50 1.2, 135L, 100 macro (not L), 17-40.... For the kind of photos you're looking for, the 85 is awesome. On the other hand... the AF kinda sucks.
Probably not the smartest advice... but if you're willing to put in more work to frame everything to that one focal length and won't be snapping too fast without a chance to retake, I think it's a good one to consider.
Buy highest quality, don't look back.
Buy the 24-70/2,8II.
Allround talent.
If you are more the tele- type: 70-200/2,8II.
I love my 35L and 135L. But the two zooms I use 80% of my shots because of their versatility.
Sell the 5D2 while you can still get a decent price for it, and buy a 5D3 with a kit lens...either the 24-105mmL, or I hear you might be able to get the 24-70mm as a kit lens?
Sell the 5D2 and put that money with your $2K and get the 5D3 and kit lens.
If you have cash left over...the canon 85mm f/1.8 is actually a great bang for the buck non-L lens....