It depends what you mean by body composition and what you consider ideal. There are a thousand different means to this I.e posture, size, weight loss, symmetry, balance, gait, flexibility, mobility, specific skill improvement...
These all change body company somewhat but an ideal composition is going to be different for a rock climber than a sprinter than a power lifter than a swimmer. What do you want to achieve?
I like to think training elevates our abilities to function optimally or above in the unpredictability of life.
If you asked me 2 months ago, I’d have said...zercher cycle, clean and press (two I guess) Deadlift, and floor press, as I trained in a park with a bent, rusty pipe and 26 kg plates, all crushed and morphed somewhat. These lifts provided everything and more.
Now, the parks are closed, all I have is myself so I say planche, pistols, pull-ups, front lever and handstands...and they too, fit the bill perfectly, offering a new challenge and unprecedented progress in a method I’d shunned previously.
Having less options is really a blessing sometimes. Training is not only picking the right tool for the job, it’s also finding out how to make it work if you find yourself unequipped.