These are a few that I have and love. Some are more "off white" than others.
[edited : sorry, missed the Tall part, not all of these are tall, but they are pretty. Have added the heights.]
Angels Flight (Hall-D.F., 1969) 28'
Carolina Sugar Daddy 33"
A NOID that I call Dunloe Wild White
I rescued this one from an overgrown patch of woods. Here is what it looked like (picture from 2008 taken with my old phone)
Ice Cream Dream, a bit pinkish. 22"
Joan Senior 25"
Lillian's Thin Ice 36"
Ladybug Pathfinder , more cream than white, but close. 30"
Margo Reed Indeed 28"
Old Mount Vernon 32"
Westbourne Miss Personality 28"
Westbourne White Christmas 24"