Pines Family:

Dipper Pines

Mabel Pines

Stanley Pines

Stanford Pines

Townsfolk:

Lazy Suzan

Tyler Cutebiker

Toby Determined

Tats

Blubs 

Durland

Wendy Corduroy

Manly Dan

Soos

Abulita

Etc.

Supernatural beings:

Bill Cipher

"Steve"

The Gnomes

Merpeople

Gobblewonker

Etc

AUs:

Rev Falls

Monster Falls

Fight Falls

Blinded

Trandecence (plz tell me if I spelt it wrong)

Reunion Falls

Cipher Twins

Immortal AU

Potterverse Falls

And many others I cant remember