I've just discovered Spanx tights! Bought a pair to try from TKMaxx - £3.99 to £6.99 depending on plain, patterned or opaques
They are amazing - smoothed out all my lumpy bits, very comfy to wear all day, no rolling down, bagging at knees or wrinkling round ankles
Lots of choice of sizes which came up accurately on me (size 14-16 5'4'')
I'm going back on Saturday to buy a few more pairs