I have been spoiled by Falke as their 100den come in multiple sizes, cover everything, and never fall down.
But they are beyond pricey (I could get shoes or a t-shirt for that price). EBay has a few colours regularly (purple, dark charcoal, and a brown called Brenda!). I have managed to get one black pair on there.
Any others that come close? I think I tried M&S and they aren't as thick plus they don't quite fit (not as many sizes). Boden are rubbish. So basically is any other brand... Any thoughts?