heh, oh boy
There is a ton.
Grants Vanilla Custard is probably the most well known, but impossible to get without putting effort forth. It IS attainable though. Direct from his site, or from PinkMule. Often out of stock though. Fans would say its worth the wait. Ill say its a solid representation, but nothing earth shattering. Kinda like, your second choice prom date. Not mind blowing, but an enjoyable sure thing.(heheheh)
Nicoticket
Custards Last Stand
Creme Brulee
-always available, loved by many, said to be the "Grants Killer". Creme Brulee, IMO, is the better of the two because it adds some complexity. Im in the minority here, but niether blow me away. there are those who will tar and feather me for speaking ill of Nicoticket

This is mega popular juice right here.
Big Willies(or is it just Willies?). get it through facebook, this is garnering quite the following. Havent tried it.
Now for some of my personal suggestions:
HighBrow Vapor
Creme Brulee
Vanilla Bean decadence
Vanilla Bourbon Bean
-Listed in order of the best first, all of them are true to real life flavors. You can tailor your own pg/vg ratio, but the suggest 80/20, or at least a bias to PG. If these juices were high VG juices, Id probably like them more. That said, highbrow makes some great juice all around. They make their own flavors and extracts, and the result is obvious.
High Caliber
Killa Vanilla
-This is, IMO, the best non-boutique juice, ever. A Puuuuuuurfect vanilla. warm and inviting, without being overly sticky or cloying.
And my top favorites:
The Standard- Cell Block Four. Creme Brulee cake with the fainest hint of fruit, this is my #1 juice of all time.
BluePrint- C.R.E.A.M.(Custard Rules Everything Around Me). VERY similar to Cell Block, without fruit, and an added hint of graham cracker. Subtle, but there.