A few random thoughts that haven’t been mentioned yet:
Tot is a menubar app for quickly storing and accessing notes, and there’s an iOS version it can sync with.
The Unarchiver is a handy tool that supports a lot more formats than the system does, including rar and 7zip files.
1Blocker is the Safari adblocker I use. Works well on Mac, but noteworthy is that the iOS version has a “firewall” that uses a local VPN profile (doesn’t actually connect to an outside service) to block trackers in Safari as well as native iOS apps.
If you work with text in almost any capacity, BBEdit is still essential 32 years later.
Acorn and Pixelmator Pro are both great image editing apps; Apple just acquired Pixelmator though, so it’s not clear what’s going to happen with it in the long term.
Transmit is a great file transfer app, Panic makes absolute top tier software.