Rank The Classic Eras

1. The Sylvester McCoy Era
2. The William Hartnell Era
3. The Patrick Troughton Era
4. The Peter Davison Era
5. The Tom Baker Era (Graham Williams)
6. The Tom Baker Era (JNT)
7. The Colin Baker Era
8. The Tom Baker Era (Hinchcliffe)
9. The Jon Pertwee Era

1: Troughton Era
2: T.Baker Era (Hinchcliffe)
3: Hartnell Era
4: McCoy Era
5: T.Baker Era (Williams/Bidmead)
6: C.Baker Era
7: Pertwee Era
8: Davison Era

1. McGann Era
2. Hartnell Era
3. Troughton/Pertwee Era
4. Sylvester McCoy Era
5. Tom Baker (Hinchcliffe Era)
6. Colin Baker Era
7. Tom Baker (Bidmead Era)
8. Tom Baker (Williams Era)
9. Peter Davison Era

I separated it out differently:

1. The Tom Baker Era (JNT)
2. The Peter Davison Era (19-20)
3. The Tom Baker Era (Graham Williams 16-17)
4. The Tom Baker Era (Hinchcliffe 13-14 / Williams 15)
5. The Jon Pertwee Era
6. The Patrick Troughton Era
7. The William Hartnell Era
8. The Colin Baker Era (22)
9. The Sylvester McCoy Era (26)
10. The Peter Davison Era (21)
11. The Tom Baker Era (Hinchcliffe 12)
12. The Colin Baker / Sylvester McCoy Era (23-25)

I did too

1 Tom Baker (Hinchcliffe 14-Williams 17)
2 McCoy era
3 Troughton era
4 Hartnell era
5 Pertwee era (7)
6 Colin Baker era (21-22)
7 Davison era
8 Tom Baker (12-13)
9 Pertwee era (8-11)
10 Tom Baker (JNT 18)
9 Colin Baker era (23)

So did I.

1. Season 7 to 15
2. Season 1 to 6
3. Season 16 to 18
4. Season 19 to 22
5. Season 23 to 26

1. McCoy
2. Tom Baker (Hinchcliffe/Holmes)
3. Troughton
4. Hartnell
5. Pertwee
6. Davison
7. Colin Baker