Can you not set the notification type to "none"?
You can but then you won't get any notifications appearing on your lock screen when you decide to check it, which is what I'm assuming the desire is here. Could be wrong though.
But they will all show as banners as soon as you unlock the phone won't they?
Not sure I'm following here. I've got my notifications set to banners and the screen does NOT come on when an email comes in.