I here this a lot, but is he really? I've watched Leicester at least 7 times and I'm certain Fuchs is far and away a superior footballer to Kolarov, so is Patrick Van Aanholt at Sunderland, Monreal at Arsenal just to name 3.
His sprinting to join the attack is impressive, I'll give you that. And he does have a good low cross, but that's it. Frankly besides those 2 qualities, his tackling might be his 3rd best quality. But his ball control, his touch, his decision making and general interplay are all grossly below average. He is what I call a positional stiff. A left back who just happens to play football. What we need is a footballer who just happens to play left back.
Fuchs and Van Aanholt are terrible, Monreal is better defensively but offers little going forward.
There just aren't many good full backs about in football right now, the very few ones are all at the elite clubs. I keep hearing promising things about Jose Gaya and Ricardo Rodriguez possibly becoming brilliant but both would probably cost a lot.