To be honest there isn't a bad bike in that list. Get any of them and you'll be happy.
To let you know where I'm coming from the last bikes that I've owned post 2010 are Nukeproof Scalp, Norco Aurum, Zerode G1, Zerode G2. I currently own the G2, a Santa Cruz Driver 8 and a Spec Enduro.
If you want a bike that excels at plowing its way through the gnar, and accelerating through it, get a Zerode. As well as being exceptionally smooth and quiet through the rough stuff it generates awesome grip through off camber stuff, especially so if you're going to run a Dorado on it, which is how I have mine. It is a bit of a grip monster in general once you've familiarised yourself with it, it took me a few rides to get used to trail braking into corners for eg. It's a little heavier than most, but you only notice that when lifting/ loading it. I don't notice the weight at all while riding it, perhaps because all the weight is centralised between my ankles, or because I am 100kgs anyway. You are correct in saying that they don't mono so well because of the rearward axle path, but that hasn't hindered me on a downhill run. One bonus for your build is that you won't need to get a shifter, derailleur or chainguide as the equivalent parts are included with the frame. Also, I have found both of my Zerodes were incredibly low maintenance compared to other bikes I've owned.
Which brings me to the Aurum. I've owned an Aurum with an Elka Stage 5 shock fitted to it and I gotta say, it had an awesome feeling rear end. Not quite plowy, but it felt like it was glued to the ground. It offered the type of feedback that let you know exactly what the rear wheel was hitting while still feeling buttery smooth. Its high speed stability was impressive as well. The front end felt a bit flip floppy at low speed, but that could have been sorted by steepening the HA with the angleset, but I never got around to trying it. It's hard to describe how a bike feels, but I liked the Aurum a lot. I didn't have the Norco for long but in the time I had it I noticed all these little features the designers thought about that make owning it, working on it or adjusting it a breeze. Although I am a huge Zerode fan, I wouldn't say no to owning an Aurum again in the future.
As for the rest of the list I can only offer you an opinion based on their geo and reports from other people,
The Trek sounds like it is more of a race focused DH machine, made for keeping low and fast while sniping all the race lines. The Scott sounds like it is made to do that as well, but it's ability to do it as well as the Trek has been compromised a little in order to make it more lively and fun for the guy who races a bit but still wants to have fun on it every other weekend.
I don't know anything about the Lapierre.
TL
R version = Get a Zerode, they're bombproof and the best plow machine of the lot.