Konsole and Spectacle deserve a shoutout as well. Konsole for its flexibility and feature set while remaining really performant, and Snapshot for being just so darn handy for both screenshots and screen captures.
Konsole is so good I forget about it, it's just my usual terminal. Once they added the split feature, it became pretty damn near perfect.
I used Konsole for years and it's great but since switching to Neovim as a primary editor I also switched to Kitty terminal which is in its own league. Kitty is the only one that I substituted the core KDE app for.