I’m not good enough to give recommendations, but meanwhile some questions might make it easier. What is your budget? Is open source important to you? What’s the biggest thing you want to print? Are there any special features you’re looking for? Do you want to tinker with it or rather have it “just work”?
Their “dominance” is the choice of the distributions. Gnome is opinionated, and I respect that they follow their vision. To me this is free software working as intended, people are free to fork Gnome if they want something that the devs don’t want. And apparently, many distributions think Gnome should be the default. Maybe it shouldn’t, but that’s up to the distros to decide.