A decent lightweight image editor. Don't need to get Adobe. Pixelmator Pro is great for most people (if you want vector and image editing, the Affinity suite is cool too).
Logic if you're a musician. Out of the box though, Garage band is still great for non-pro work (but pros have used it too). Maybe get MainStage to compliment Garage band.
Might as well set up a package manager for Unix stuff. Ports is older and has more applications (and builds from source, so it's slow), but Homebrew is a cinch (just turn off telemetry).