I might try some intermittent fasting, since that follows my basic eating style. I only eat when I am hungry, so there are times when I might just have an apple and/or banana all day. Others days I might eat four meals. It seems to work okay. At 65, I am 6' 3" and 175 lbs with 32-33 inch waist. This is down from 225 pounds in my heavy gym weight days.
Interestingly, strength wise, I am not too far off my peak in some exercises. Last year I started jogging on the treadmills, and try to get in two 30 minute sessions a week, and two 15 minute sessions on weight days. This really knocked off a fast 15 pounds, and helped tighten the waist. I can't complain as it seems to be working, since, to my knowledge, I have no health issues. All this so that I can reward myself with some beer on Friday and Saturday night.