Windows-only recommendation so this is only somewhat related - but if you want a powerful, (mostly) well-thought-out, (seemingly) lightweight screenshot taker + editor on Windows, do have a look at ShareX[1].
It's completely free and you can tweak various workflows and map them to key combinations. I've had a "manual screenshot -> optional editing -> upload to imgur/save to clipboard" workflow bound to a mouse button (Logitech G600) for over 5 years and use it multiple times a day.
I downloaded it through Steam but whatever other download options they have should auto-update just fine as well, I would guess.
I only see this now but apparently the program is open-source. Never even knew that.