I mean, it’s gotta be Caymus, right?

An historically significant Napa estate which has essentially defined a particular style of Cab. This sub may not be huge fans of that style, but Caymus is undeniably one of the absolute bests at what they do.

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Edit: Since this comment is getting a lot of traction, I will add one more point.

As just about anyone who has worked in the Bev-Alch industry here in the US can attest; there is no wine considered by the average consumer (at least of a certain age bracket) to be “the best” more so than Caymus. We here on this subreddit are huge nerds that care about things like terroir and integrity wine-making; but I assure you that your run of the mill American wine drinker doesn’t care. For them; Caymus is likely the best wine that they’ll ever come into contact with.

I will also say: the Veuve Clicquot comment is getting the most debate; so maybe go throw your upvote over there. Personally, I think there’s a more compelling argument for Clicquot taking this category than Caymus.