I built up a pretty solid body over the years when I started going to the gym like 9-10 years ago without ever doing deadlifts, squats and overhead/military press for many years. Only thing I pretty much did from the beginning was benchpress (with horribly bad technique) and seated shoulder press with dumbbells (which pretty much hits the same muscles as overhead/military press standing, but without the benefits for legs, lower back, abs and general core muscles).
I just started doing deadlifts with proper technique like 2 years ago, benchpress, squats and overhead press even just like 1 year ago with proper technique. You easily can build up a "good looking" muscular body with machines, bad technique and without any compound movements, but I guess doing them (with proper technique) from the very beginning gives you the same results MUCH faster and without risk of muscular disbalances and injury. Also, dat strenght. You never gaina any strenght from doing machines, leg press or shoulder press seated. But man, my strenght skyrockened in the last ~ 2 years and it feels great, when you can say to people you can pick up 150-160 kg with your bare hands or benchpress your own bodyweight + 10 kg 4x8 times, slow and with proper form.