[CuffDaddy]

The issue is not plain/pleated front (properly cut pleated pants flatter all, all, ALL men, but there is no rule that says you must wear them with WT), but having appropriate rise. A tailcoat is going to end at your waist. If your pants do not rise to meet it, you will have an ungainly band of white beneath your coat and trousers. Very, very few modern OTR pants are going to have that kind of rise, and even fewer of them will have FF's.