My LDLs were in the 120s. My vegetable intake was good, but I added at least a cup of beans/day and now its in the 70s/80s.
Does it matter what type of beans?
Does preparation matter? (ie canned, dried and you soak them, or whatever)
I prefer kidney beans and lentils. I don't think it matters.
Most of the time I would just rinse and eat out of the can. I usually mix the kidney beans with salsa, but have also done with white rice depending on how I wanted to keep my carb intake.
I do well with dietary adjustments that involve ADDING something. That tends to work better for me than dietary adjustments focused on TAKING AWAY something. Saying "don't eat cookie dough" (or whatever) sounds like good advice, but it doesn't tell you what TO do. Whereas if I concentrate on adding a salad every other day or something like that — food isn't a precisely zero-sum game, but there's only so much you can eat. If a substantial block is reserved for something planned and beneficial, that naturally leaves less room for junk.
Lentils are pretty good. My wife makes a stew in the Instant Pot, lentils and chicken stock and some other things, including either bacon or Italian sausage, depending on what we have on hand. Fairly quick, and it's fucking fabulous. Very nice with some crusty bread.