First the battery technology alone fails after a few years so all failed.
In fact, the batteries are 300 cycle rated and at 300 cycles the battery is considered good if it has 50% capacity.
So to meet your 6 to 10 hours at the end of the 300 cycles you need to start with 12 to 20 hour battery times. Not one of those on your list got that many hours when used normally.
I fear you may have to relent on the years and the hours. Also, even if you replace batteries yearly to keep the hours up, you may be upset over the costs. Why not plug in when you can?
What I want: reliability and durability) able to run 6-8 years and not break), long battery life (6-10 hours), least overheating issues.
Price not important, processors are all i7s except macbook pro (i5), similar other specs or i dont care.
1. Dell 2 in 1 touchscreen i7353 8403
2. Hp spectre x360 2 in 1 touchscreen 13-4913dx
3. Lenovo yoga 900 2 in 1 80mk002cus
4. Macbook pro 13 inch