Alienware laptops have a luxurious key travel distance, unfortunately they are also huge. Thinkpads, even the most basic have great keyboards (usually), see also high-end HP. Xiaomi has some macbook pro clones that are very good as well as some of their own designs.

If you want to try them out, I'd recommend a Microsoft store if you have one around. Lots of high-end laptop keyboards are represented there.

I quite enjoy the keyboard on my ThinkPad X1, especially compared to my MBP keyboard. I could say the opposite about the touch pad, but that wasn't the question.