I uploaded the photo to prove to SackSuitLover that it's possible to have a tapered full trouser (btw, that one is my fullest pair of trousers). No comparisons to your trousers, our bodies are totally different.
Btw, just saw the pleats on your light gray trouser and they're really shallow, have you tried deeper pleats?
The brown trousers I posted yesterday have double forward pleats that are quite deep, but anyways, I've completely given up on pleats. To avoid them gaping open on me, trouser hips have to be cut really, really full - not flattering. Plus they are a bitch to iron on woollen flannel.