I would like to compile a followers list of the easiest/quickest ones to acquire specifically for someone with many alts.
I have noticed that I can pretty much run enough missions with 8-9 followers without much downtime on multiple characters.
Horde bias sorry Allys
1. Olin Umberhide - can't miss this one, it's the first garrison quest for a follower - estimated time - 5 mins
2. Ulna Thresher - one of the first garrison missions you will get and it awards this one - estimated time - 2 mins
3. Ka'la - one of the first garrison missions - estimated time - 2 mins
3. Dagg - just unlock his two cages and he shows up at your garrison - estimated time - 15 mins (running)
4. Mulverick - rescued when questing near bladespire fortress, you will be there anyway to open garrison level 2 - estimated time - 10 mins
5. Shadow Hunter Rala - Another early level quest series - estimated time - 15 mins
6. Vivianne - awarded from the simple questline to fly to Ashran and talk to some people - estimated time - 7 mins
Please add any I am missing. The goal is to get 10 followers ASAP once you hit 92