KDE and Gnome are the most prominent and they "match" in the sense that they are mature environments that are quite usable. These have been in development for decades. For some reason, in the case of Windows, that doesn't mean much. I've never seen a Windows version with a buggy task bar but here comes Windows 11 with a task bar that forgets application icons (and replaces them with the generic application icon) and is generally sluggish to the feel, in my experience. Scrap my entire first sentence: it's Microsoft's turn to make an operating system as good as the competition.

There are several good quality distributions. Linux Mint is often mentioned, it comes in different flavors, including its own Cinnamon, which would also not feel too alien to the average Windows user. In my opinion, Fedora is also a good choice based on the last few years of running it on various laptops.

It's very easy to run some popular distribution in a virtual machine to get a feel for things if you're just curious.