As mostly a prog metal head, I would vote for Soul Secret - 4. It kicked my a** from the first listen and stayed strong all year long. Between the Buried and Me and Native Construct were amazing strong releases as well.
Wow...Wilderun is amazing. Thanks so much for posting the link.Wilderun - Sleep at the Edge of the Earth
https://wilderun.bandcamp.com/
Symphony X, Soilwork, and Ghost Ship Octavius are up there too.
I intend to select by catagory: Best Prog Rock, Best Prog Metal, etc.
Right now I would say my Best Debut Album goes to Transience - Temple.