Amongst all the pictures posted, the only one I like it's the Pharrel's one. I like the pocket square he's wearing, I can see myself wearing that look and feel comfortable (except the flashy belt buckle and maybe the white watch strap).
For me, if you are going for the three piece formal look with the vest, you shouldn't even be wearing a jean or running sneaker.
All the trouser on my suit has no belt loop because they are bespoke, it sit flatter, more comfortable. At the standing height you shouldn't see any belt nor shirt, even with the lowest button undone.