Your squat and deadlift are not necessarily weak comparatively. Your morphology could simply be very conducive to benching. And on the clean and jerk. I'm not sure your technical proficiency, but if you are particularly good at these lifts, that is the same clean(although not jerk, which was 300) I have attained when only being able to back squat 350.
My morphology is similar..I have very long legs at 6'3 and average length arms...that, coupled with othter things such as connective tissue strength(which my lower back lacks from a back injury i suffered when I was 18 lifting an engine block...young and dumb...what can i say) my squat has never been stellar, highest for me was 405. You should also pay attention to your body's posture.
Do you have excessive anterior or posterior pelvic tilt. Are your glutees inhibited. Tight hip flexors? Internally rotated femurs? If you fall forward...adjsut your training to compenate for that...I recommend safety bar squats. Bring your handss in closer together when you squat and focus on driving your head back also.
Goodmorning..while a fine exercise...havee never personally helpd me with falling forward...even when pushing the weights high...but that is me....trial and error is the name of the game.