Welcome!
Were I starting a new kit with a decent budget building around the D750 I would do the Nikon f/4 sort of trilogy, 16-35 AF VR f/4, 24-120 AF VR f/4 and the 70-200 AF VR f/4. Got more dough mix in some f/2.8 like @jaydean above does.
2 things you may not be yet aware of..... do not...