For Go North East I'd say:
1. 21
2. X1
3. X66
4. 20
5. 10/10A/10B
6. 309/310/311
7. X21
8. X45/X46
9. 16/16A
10. 56

For Arriva I'd say
1. 308
2. 7 (Darlington - Durham)
3. X21/X22
4. 6
5. X93

Not really sure about Stagecoach.