For a gaming laptop, the most important element is the GPU. Since these all have NVIDIA GPUs, the "tier list" is actually pretty easy:
Best: 3080 Ti, followed closely by 3080
Great: 3070 Ti, followed closely by 3070
Still decently good, but may need to lower resolution: 3060
Getting pretty low: 3050 Ti/ 3050
The 1660 Ti is a fair bit older, but I would probably put it between the 3050 Ti and 3060.
It's a little more complicated for laptops, unfortunately, because different laptop manufacturers will use different power limits for their GPUs, which will affect performance, and thermal constraints will also have an impact. But these are all full-size laptops, so I would expect at least decent thermal performance on each.
The Legion has by far the best GPU and is pretty close to the maximum power limit. The Legion series are also know to have good thermal design and performance.
What about CPU? Less important, but still important to an extent. The way to interpret a CPU name is as follows:
1. The first digit or two will be the generation. For AMD, the 6th generation is the most recent, and for Intel it's 12th.
2. The subsequent numbers typically represent the relative power of the CPU. So, the AMD 5900 will be more powerful than the 5800.
3. There's also a kinda subname - Ryzen 3, 5, 7, or 9 for AMD, and i3, i5, i7, or i9 for Intel. Again, bigger number typically means higher performance. But you can already tell that by point 2, so this is more about branding to be honest.
It can be a little tricky to directly compare Intel and AMD, especially across different generations, but I would estimate that the Legion (with its AMD 5800H) has the best CPU, followed by the Asus TUF Dash (with its Intel 12650H), and then the others. Another point for the Legion.
Otherwise, there's memory and storage. All of these have 16GB RAM except the first MSI one (which has 8GB and I would not recommend). At least one is DDR5, but DDR4 is just fine (I doubt you'd notice the difference). And they all have a 512GB SSD. You may want to add more storage and/or memory in the future. You can definitely do so on the Legion.
There's other stuff to consider, but that's the main gist. For me, the biggest factor I haven't mentioned so far would be the display. Once again, the Legion wins - it's the only one which is QHD rather than FHD, it has a very good refresh rate, and it gets plenty bright.