I want to see characters that have been in the montrer to still return like: Scott, Courtney, Duncan, Gwen, Heather, Lindsay and etc. but, since you're asking about characters that really haven't been in the montrer too much here's my list.
1. Noah 2. Eva 3. Trent 4. Geoff 5. Bridgette 6. Blaineley 7. Leshawna 8. Brick 9. Dakota 10. Anne Maria