Think in terms of making several different salads, one a day. That way, you can mix and match across the week. Some of them get better with age, especially the vinegar ones.
I make a cucumber/yogurt/dill one (salt and drain the cucumber first).
A general chopped one- spring onions, tomato, sweetcorn, lettuce, peppers etc, but all chopped small including the lettuce.
Rice salad with peas sweetcorn and peanuts
Florida salad, with fruit and mayo.
pasta salad
Shredded carrot and sweetcorn and peanut butter salad.
coleslaw with or without apple and walnuts
5 bean salad with chopped tomatoes, onions and a sugar/vinegar dressing.
Salad toppers- seeds, peanuts, fried onions (in packets).
Quick pickles- things like courgette ribbons, shredded cabbage, mushrooms, packed into a jar and topped off with seasoned vinegar. Leave it a couple of days then add it to your salads.
Oh, and sauerkraut and kimchi!