One of the first tools people tend to install is either Alfred or Raycast. I never used Alfred for more than a nifty app launcher, so a few weeks ago I've decided to uninstall it and just use the integrated Spotlight feature (⌘ + SPACE).
Same with window arrangement tools like Rectangle, Magnet or Swish. There's no real need since macOS 15.1.
What you DO need is AppCleaner. Instead of just dragging an app to the Recycle Bin to uninstall it, drag it into AppCleaner and it will find all additional stuff that app created and allow you to remove that, too. Maybe also add UninstallPKG to remove remnants of apps that were installed using .pkg
files.
What I also use on a daily basis are a few extensions for Safari: Wipr to block ads in Safari, Noir to not get blinded at night, and SponsorBlock to skip ads in YouTube videos.
If you often download videos and audio files, Downie is pretty good for that.
Media playback: IINA and/or VLC.
If you want to play around on the command line, I prefer iTerm2 over the built-in terminal app. Install Homebrew to get a nice easy way of adding even more command line tools.
If you often organise your files using Finder, Yoink is great as a temporary bucket. iPreview and Peek (maybe Syntax Highlight, too) are great for previewing various kinds of files (SPACE in Finder).
For my office needs, I'm using all the integrated apps, e.g. Pages, Numbers, Calendar, Contacts, Reminders, Notes, Mail, etc.
I think that's as generic as it gets. I have lots of other apps, but they are mostly for specific things... nothing I use on a general basis.