I think they have all been said, but here is my go-to list of creators:
Cpt. Canada
V1 Simulations
320simpilot
easyjetsimpilot
J. Favigano (he does a lot of other types of gaming as well but his flight sim vids are pretty good!)
V1 simulations and 320simpilot really helped me to learn the A320 as they really take the time to go through start up and prepping the box.