I went through this decision over the course of about a yaar. Thoughts were:
SC Nomad/Nomad C - A bit high, short in the TT, and a bit old, geometry wise. But was tempted - the Nomad C is very light for what it's capable of, and SC seem to be ahead of the curve a bit with Carbon bikes
Bronson - Better geo than the Nomad, lighter (but not as burly), but 650b meant new wheels/fork for me and ultimately too much cash
Intense - Made by Intense, so no thanks.
Yeti - Hummed and hawed over this one a lot, in some ways I liked the idea of the long TT, but Yeti's insistence on 150mm up front and the overall length had me thinking it'd be poor uphill with my 160 forks on it. Alloy frame is relatively heavy too, considering the travel.
Covert Carbon - For such a big premium over the Alu model, there's not much of a weight difference. Think they played it quite safe and overbuilt it a bit. Was still high on the list, regardless. I just liked it.
Mojo HD - Liked it, thought about it a lot. Steep at the front, compared to some of the competition, though, but I was close to buying one with an angleset.
Scott Anything - having seen the shambles that was the Ransom (knew four or five owners), I'd never consider a Scott, especially one with a complex proprietary shock. Poor initial reviews for the Genius too.
Cannondale Jekyll - Wary of the pull shock, and it locks you into one type of shock. Didn't think past that, tbh.
Enduro - Would happily have had one, but just so expensive, if you can manage to get one frame only. Full build insane money and some ropey parts.
Banshee Rune - Liked this a lot, good value, 650-future-proof, came with a CCDB, but 8.5lbs with CCDB is very burly indeed.
Ultimately got the Ion 16 'cos the angles all looked right, and I figured the build quality and solidity would give me confidence - I was right - fits like a glove, and I trust it. Could probably have saved a pound of frame weight with one of the above, glad I didn't.