Looks like fun! I will be interested how it rides being more of the long slack variety of current geometry trends, but you said you’re tall so maybe it’s not too far out there. It’s not like you can compare it to another bike though, that’s the funny thing about 36ers, unless you build a bunch and test ride them all…how to choose the best geometry?
It may be worth placing the bend on the seat tube higher up for more tire clearance and allowing a slacker effective STA, just in case you went with 76 to get enough tire clearance.
I know I like low BB’s but could always go with less BB drop than 150 and would give more room for 180 cranks. The bike I built Travis had 135 drop and he likes that add BB hight better than mine with 150.
You should have plenty of room to the tire for a long dropper, but it’s the one type of bike you need to check bottom of saddle clearance to the tire when fully dropped 
When you get to the seatstays, make sure you bend them as close to the tire as possible. I don’t recommend a segmented style to achieve the quick bend back to the seat tube. Your leg may rub on that bend so a best to keep it as narrow as you can (and not sharp).
I would build it and use the Nimbus Nightrider tire in the meantime. The traction of this diameter tire on dirt is impressive even with no knobs. Some day another tire will become available. One thing I’ve wondered about, why hasn’t David of Dirty Sixer convinced one of his several pro basketball player customers to invest in a new 36” MTB tire?! They have got to have some funding there. He sold bikes to the entire Utah Jazz team!