My choice fell on the Walimex hotshoe, which I have donated their own quick release plate. After 2 years of use, I'm still impressed how quickly and easily constructed. Important also, that a large system including flash softbox is kept absolutely reliable, even in 90-degree angle. And he is absolutely. The clamping is very reliable and consistent thanks to the large thumbscrew. Good processing in a rugged finish.
Works even after countless missions in the field still like the first day. Just great!