It's not to say that there aren't other reds, but some brands seemed to do better with them across the board (in the statistically significant opinion of Reds appreciators, as reflected in TR for instance).
It's not very controversial to say that McC was the king of Reds. Of course there are outliers who never preferred their take, but it's obvious among those who talk tobacco that there was a widespread, dominant preference for McC reds as in their Christmas Cheer, 40th Ann, McCranies, etc.
After McC gave up the ghost, Sutliff sort of took their place among Reds appreciators with Cringle Flake for Christmas Cheer, 515 RC1 for Red Cake (although IMPO that one was a massive flop), and TS1R could be seen as a replacement for McC blending red or as a non-vinegar version of Red Cake.
With Sutliff giving up the ghost 7 years after McClelland, it feels a little like the last man standing being taken out.
C&D is fantastic for many things, but their reds have not always been received in quite the same way. Their Red VA Ribbon for instance just isn't quite as good as TS1R, to many of us (a pretty widely held opinion). Now many smokers do really like a red VaPer like Kajun Kake, granted; unfortunately, something about that one just doesn't work for me (although I used to love McC 2015, arguably similar). I was recently introduced to Interlude, and that one is worthwhile to me, granted.
The great exception with C&D is obviously their Carolina Red Flake. That one is up there with the greats. But, you know, it's a very limited release once a year, tough to get your hands on (and actually I'm not clear on its future now? Will that keep happening?)
I should admit that I haven't yet tried Edisto. Maybe that's what I'm looking for.
And I do like Capstan, but to me it's not twice as good as others so I hate spending twice as much.
Some of the others, like McConnell, etc. are just sort of weird to me.
So sure I overstated things. The point is just that, there was a time that when you thought of Reds, you thought of McC, and after them, if you thought of Reds you thought of Sutliff, and now, no single blender really stands out as the Reds specialist. That's just my sense. YMMV.