>>2361346No clue what you call this one in English, but it's what I use the most.
Super versatile, and you can always open it again, no matter how much load it sees.
I also use double sheet bend, a variation of icicle hitch and clove hitch a lot for different purposes.
Those 4 knots cover all things I ever use rope for, and I also splice loops on many of my ropes to make life easier.