That's a weird concern about Tatum. I mean, for one, Carmelo was a great player for a long time, and if you've got a #5 pick that develops into Carmelo, I think you're happy about it.
On the day of the 2017 lottery I was at an event in the newly-constructed Golden 1 Center where I overheard a fan ask Ailene Voisin "Fox or Tatum?" She replied, "Fox, of course!" but I recall being a bit uncertain about that, as I was convinced Tatum was going to be very good. (I feel OK on this, BTW.) But at #5, yeah, Tatum was a guy that might have been there based on the mocks, and if Fox and Tatum were gone we were worried about whether we went with Josh Jackson, or the Markkanen/Isaac/Smith conundrum, with a few people wondering whether Donovan Mitchell was a worthy stretch at #5. Fortunately, we didn't have to face that question.
And yes, let's hope that we continue to bat 1.000 on unanimous picks!