Sure...a clown. Romero had one in Day of the Dead and clowns are creepy anyway.
1. Fire fighter
2. Beat Cop
3. Nurse
4. Ventriliquist (with dummy)
5. Easter Bunny Mall worker (to go with Santa!)
6. Old Folks home patient
7. Steel worker (construction worker, hard hay, work boots, toolbelt)
8. Whatever ethnicity it is that wears turbans from the middle east
9. EMT
10. Park Ranger
11. Fast food worker
12. Choir boy
13. Dentist
14. Vet with undead doggie and half eaten undead kitty
15. A Junkie
16. Prom Queen
17. Football player or other sports player
18. Limo driver/chauffeur
19. Stripper
20. Kids (the babysitter needs company).
Also, not everyone in the world is Caucasian...if you want some diversity, different ethnicites can be zombies too. It worked for Blackula and Blackenstein.