From US News and Daily Report diets are ranked in different groups such as:
Best Weight Loss (Weight Watchers ranked #1, Biggest Loser second)
Easiest Diet to Follow (Weight Watchers ranked #1, Jenny Craig second)
Best Heart-health Diet (Ornish ranked #1, TLC close second)
Best Healthy Eating (DASH ranked #1, TLC second)
Of these many diets, the only one I followed consistently with great results was Weight Watchers
From USNews
How does the Weight Watchers Diet work?
There’s no fixed membership period; many people who join Weight Watchers stick with it even after they’ve shed unwanted pounds. <span style="font-weight: bold">You can eat whatever you want</span>—provided you stick to your daily PointsPlus target, a number based on your gender, weight, height, and age. You can find the points values of more than 40,000 foods on Weight Watchers’ website. Processed choices like bologna usually have the highest point values (meaning they should be eaten in small amounts or less often) while<span style="font-weight: bold"> fresh fruits and vegetables carry zero points, so you can eat as many as you’d like</span>. That’s because they’re high in fiber and are more filling than, say, a candy bar. (Fruit juice, dried fruit, and starchy vegetables don’t count as freebies, since they’re higher in calories.) Weight Watchers also pushes specially- designated Power Foods, or the best choices among similar foods. If you’re mulling 10 types of canned soup, for example, you can quickly see which has the least sugar and sodium, the most fiber, and the healthiest types and amounts of fat.
Best Weight Loss (Weight Watchers ranked #1, Biggest Loser second)
Easiest Diet to Follow (Weight Watchers ranked #1, Jenny Craig second)
Best Heart-health Diet (Ornish ranked #1, TLC close second)
Best Healthy Eating (DASH ranked #1, TLC second)
Of these many diets, the only one I followed consistently with great results was Weight Watchers

From USNews
How does the Weight Watchers Diet work?
There’s no fixed membership period; many people who join Weight Watchers stick with it even after they’ve shed unwanted pounds. <span style="font-weight: bold">You can eat whatever you want</span>—provided you stick to your daily PointsPlus target, a number based on your gender, weight, height, and age. You can find the points values of more than 40,000 foods on Weight Watchers’ website. Processed choices like bologna usually have the highest point values (meaning they should be eaten in small amounts or less often) while<span style="font-weight: bold"> fresh fruits and vegetables carry zero points, so you can eat as many as you’d like</span>. That’s because they’re high in fiber and are more filling than, say, a candy bar. (Fruit juice, dried fruit, and starchy vegetables don’t count as freebies, since they’re higher in calories.) Weight Watchers also pushes specially- designated Power Foods, or the best choices among similar foods. If you’re mulling 10 types of canned soup, for example, you can quickly see which has the least sugar and sodium, the most fiber, and the healthiest types and amounts of fat.