Which mountain bike?

I'm getting more into mountain biking. After using my gravel bike for the past year, I am ready to get a dedicated mountain bike. Can you help me decide?

I will be primarily riding trails local to Michigan. Below are the bikes I am most interested in. Some have upgrades, some do not. I am not sure how to rank them against each other, therefore I do not really understand the value across the different bikes. I am primarily looking for a hard tail. If I found a full suspension that I thought may be reasonable, I did add it. They are all XL frames (I am 6'4") except for one, which is a XXL. I appreciate any help and insight.

All links are Imgur galleries and a description from the seller is beneath the link.

2018 Vitus Sentier – $600 – https://imgur.com/a/Tfzypvm
Super fun bike that is great for ripping around trails. XL frame, 27.5 wheels, maxxis 140mm Rockshox pike fork, 175mm Rockshox reverb dropper, carbon Santa Cruz bars, carbon Scott saddle, and sram code rcs 4 piston brakes. Will come with shimano SPD pedals instead of the flats in the picture

2020 Giant Trance 2 – $1,000 – https://imgur.com/a/njAedPQ
Giant Trance 2 extra large size, 2020 model year. Original owner. Great condition and maintained annually at local bike shops. Hasn’t been ridden in a year. $1000.

2021 Trek Roscoe 7 – $800 – https://imgur.com/a/DReoRw8
XXL frame Dropper post 29er tyres Mint condition Bought it brand new and only rode it less then 10 times. Had a service done 2 years ago and have only rode it 2 times since then.

This bike is a 6 hour round trip for me to pick up. A little hesitant for the drive, but willing if it is worth it.

2020 Diamondback Sync’r – $750 – https://imgur.com/a/Xdyg1oM
This is a 2020 Diamond back Syncr. This bike has many upgrades including DVO D1 suspension fork, Bike Yoke dropper post, Magura brakes, Spank Oozy wheel set among others. The size is XL, 35mm bars, 27.5 wheels and 150mm fork travel. $750 message with any questions.

2019 Trek Roscoe 8 – $1000 – https://imgur.com/a/ZsxAvmQ
Trek roscoe 8 with maybe 50 miles. Rental fat bars (uncut), ODI lock on grips, original line 40 rocket ron wheel and tire set plus a set of kovee 29s with maxxis ardent tires. Bike has some chips and scratches. Rides great. XL size. I just never got into riding it. $1000 FIRM. NO TRADES.

Seller is not willing to separate the wheels.

2019 Salsa TimberJack 27.5+ – $800 – https://imgur.com/a/9Y3datW
2019 Salsa TimberJack 27.5+ size XL has riser bars drop seat great bike just no longer use. $800 OBO