We just installed one and the sink is not flush with the wal

i can get a photo tomorrow if you would like

no it doesn't. a lot of wall mount faucets are 7-10" from the wall. and water won't splash out unless you have one of those flat sinks and super water pressure!

I just installed this one in my neighbors bathroom. it's from the Kohler Purist line and has an 8" spout reach.

a vessel sink would fit perfectly right where the sink is located. there is plenty of clearance.

if you need more depth, install the faucet over tile, or like I did, I brought up my countertop 12" up the back. it gives your spigot another 1" of reach. This is the Brizo wall mount. 8"

this one used the wood trim around the mirror to bring it forward

you don't want your faucet too low to the bowl because it will get in the way when you wash your face or hands. and you don't want it too far forward, same reason. shoot for the middle or just in front of the middle.

this is horrible placement. it's far too low

these are good. show your dumb contractor pictures. none of the vessel sinks are flush to the wall and there is enough room to place your hands in the water without touching the bowl or the faucet. make sure you measure well!

You want to be able to clean behind it so just make sure you got the right faucet