There is no one ideal weight because beauty is in the eye of the beholder. Each person will give you a different formula. Even within one sport, there exist many different proposed formulas for ideal body weight. For example, this article shows the many different forumulas proposed by scientists and athletes within the sport of professional bodybuilding. The famous old-school bodybuilder Steve Reeves gives this formula:
Bodybuilding legend Steve Reeves presented simple formulas for
calculating what he considered to be ideal muscular weight. He
suggested starting with a base of 160 pounds and adding 5 pounds for
every inch of height above 5'5". For people above 6'0", he suggested
starting with 200 pounds and adding 10 pounds per inch. Using these
formulae, a person 5'9" would have an ideal muscular weight of 180
pounds. A person 6'1" would weigh 210 pounds. The problem with these
predictions is that they do not consider bone structure size.
The bodybuilders of today would give a different formula than Steve Reeves. They would lean towards a much heavier ideal weight because that's the current trend. The best thing you can do is to look at who you want to look like and follow their formula. Maybe it's Steve Reeves, maybe it's not. And if they don't have a published forumula, look at their current weight and height, then make estimated adjustments for your height.