What bike are you riding now? I'm super happy with a 120mm fork riding the shore/Squamish. You can't run an angleset with an integrated headset. Careful running a super long post, you might not be able to get enough insertion to get your saddle height low enough at full extension. And assuming 30mm is a typo, but I'm running a 40mm (tried 50mm initially). I wouldn't go XL at your height.

nope not a typo, give me a long af top tube and the shortest stem i can get. Ive been on a large steel honzo for the better part of three years now. Its set up with a 140mm fork up front, 27.5+ wtb vigilante tough casing tyres and cushcore front and rear. Had a banshee rune that over lapped the honzo for about a year, and a session before that, see a trend yet? So im coming from zero rear travel. 

I dont know why this is such a hard sell for you guys.
The geo for this thing is based off an axle to crown of 506mm, a fox 36 140mm is 547mm so that would slack the head tube out to about 64.5, sounds like a party to me. But might put the seat too far back with a long dropper, and the bb drop would only be 30ish mm. Maybe I really lay it all out there and run a 27.5 on the rear.
Im not looking for something plush, quite the opposite. I want something snappy and really progressive in the rear, think dual slalom bikes for yesteryear.

The way modern forward geometry works biases your weight on the front end so it makes a bit of sense to run a more aggressive spec front suspension than the rear end.