I had a similar issue.
Changed my discs fro EBC grooved discs and they vibrated from new.
Put up with it for a while and then gave up and bought new again after only 3000 miles., assuming they were warped.
This time, I very, very thouroughly cleaned the hub face with a wire brush in an angle grinder and thinners to get every trace of dirt off.
I suspect that the first set had a tiny speck of dirt behind the disc when fitted and because the discs are massive, that equated to massive run out at the edge, causing the vibration.
Cleanliness is obviously next to godliness.