I’ve had a bit of a look into Tumbleweed and it sounds like it’s similar to Fedora in how it handles packaging of proprietary software which I found pretty annoying, but I could be wrong.
It’s true that Arch is leaner towards proprietary software if that’s what you mean. An example of this is how the Nvidia drivers are just found within repos for Arch (thus enabled by default), while on both Fedora and openSUSE it’s not found in the official repos. Both have made it easier over the years to somehow include options and whatnot within the installer to ease Nvidia users in, but the experience on Arch is definitely smoother.
Furthermore, Fedora is indeed (kinda) hardcore on FOSS, similarly to Debian. While Arch simply doesn’t care in most cases. My relatively short endeavor to find out where openSUSE fits in seems to point towards openSUSE leaning closer to Debian and Fedora.
What’s perhaps important to note is that in all cases there are third party repos that can easily be enabled to acquire proprietary software.