I dropped a good amount (40 pounds) that were not going away with exercise. I used Dr. Gundry's diet, which I found out about here.
It uses a diet free of any grains and sugars, which really worked for me. It is stringent, so you need to be ready for it. I didn't cut down on portion size, but changed radically (to my south american eyes) what I ate.
I eat bread rarely to not at all now. The same with some great favorites like pasta, rice and beans. I eat mostly leafy vegetables and any kind of protein. No fruits, but do take vitamins to make sure that I'm nutritionally covered. No soda of any type (diet or hi octane) and mostly drink water, tea or some coffee.
I will periodically go off the reservation, but it is the exception and have mostly switched from beer to clear spirits for when I do drink. Overall it's worked well, but as I mentioned, you do need to be ready to make the transition not as a diet, but as the way you eat.
Just my 2 cents, that is what worked for me.