I love Linux Mint, and always used cinnamon. I Loath the gnome experience, and XFCE has always struck me as too old feeling and sparse. Currently I use EndeavourOS with KDE Plasma and I couldn’t be happier.
If you’d like to try out KDE but don’t want to move away from a more stable experience to an Arch based distro, I can recommend MX Linux. It’s based on Debian stable instead of Ubuntu, and has a KDE plasma spin.