There are only two types of HDDs out there: Those that have failed and those that will fail at some point in the future.
For that reason I think the way to determine "the best" among the biggest players (Seagate, WD, HGST (which is part of WD), and Toshiba) is to look at the warranty policy for the particular model you're interested in (the policy can vary from drive to drive from the same manufacturer).
I no longer have any Seagates (the last one died a while ago), but still I have drives from the other three. I prefer WD Black drives, which the last time I needed to check still had 5 year warranties. And I know from personal experience that WDs replacement procedure for drives in warranty is excellent, as long as you have a bona fide covered drive that isn't a gray market item. I can't say the same for the others. I've been buying WD Black drives exclusively for my four systems and I always always always register them at the WD site immediately. Over the course of 40 or so drives over many years I needed to replace WD drives about 5 times and it was always a very painless experience.