My favorite knots to add to your list are adjustable grip hitch (AGH), siberian hitch, and zeppelin bend.
The AGH is super easy to tie and very versatile. The Siberian is useful for tying a rope around a static object such as a pole or a tree. Bends are rarely useful for me since I rarely need to join two ropes together, but if you are going to learn a bend, you might as well learn the most beautiful one.
Yeah I think the zeppelin bend is the greatest knot ever, extremely secure and 100% jam proof (jam proof means the knot is easily untied even after extreme loads). I can’t think of any other bend that has those two properties, usually it’s one or the other
> Bends are rarely useful for me since I rarely need to join two ropes together, but if you are going to learn a bend, you might as well learn the most beautiful one.
I'm sure I've used a sheet bend at least three times in the last year in random situations. I haven't used the zeppelin bend, but I would say having an easy-to-learn-and-tie-but-effective knot "in your kit" is quite useful; you never quite know when it will come in handy.
The AGH is super easy to tie and very versatile. The Siberian is useful for tying a rope around a static object such as a pole or a tree. Bends are rarely useful for me since I rarely need to join two ropes together, but if you are going to learn a bend, you might as well learn the most beautiful one.