The vast majority of people don't need any extra anterior delt work; however, must have under developed rear delts and rhomboids.
If you are doing push presses, these should be first in your program. If your goal is overall size, then nothing beats a strict standing over head press. Nothing. Make that the crux of your owrkout.
Br
^ Read this post. Read it over and over again, because this is the best advice anyone can give you.
You want shoulders? Get your strict press up to 200-250. Don't focus on tons of movements and miraculous training routines. Just keep adding weight until you can press 200-250. I guarantee you will not show me a single man in the weight room that can hold a 225 barbell overhead his head that is small or weak, and his shoulders will probably be pretty healthy.
Another thing, don't put much focus on anterior deltoids. They are stimulated sufficiently with inclines, dips, flat bench and strict pressing. You also put your shoulders in bad positioning when you are on the computer, driving and anytime the scapula is slunched forwards.
The more movements focusing on the shoulder, the harder it will be to progress on all of those movements, so just keep focusing on development of your strict press. Do your lateral raises and bent over lateral raises to focus on deltoid development. You'll need to focus on scapula retraction and external rotation of the humerus as well - bent over rows, bent over lateral raise, face pulls, ect.
Zir Red, you have a valid understanding of the human body and its physiology and the way the body works. Your knowledge is greatly appreciated, especially by myself. We need more people like you on this board and in everyday gyms.
Edit: Contracting the quads help stabilize the knees at the bottom so you don't use knee drive.