Wide open spaces on the small screen.

Deadwood, with a big gap before #2.

The Wild Wild West, because it would also win "Best TV Anything"

Bolgani is wise and correct.

The High Chaparral, (but really the answer is Deadwood)

It really depends on what you're looking for in a Western, or if you're looking more for a
Western variant. For example, I voted for Maverick because I enjoy it and James Gardner,
but is it a true Western. I guess, but I would think something like Gunsmoke is more a typical
Western. I liked the various Zorro series quite a bit, but I see them more as a super hero show.
The Lone Ranger likewise. I never watched too many straight Western shows. Maybe the
Rifleman. I think I watched that one more than most. Watched a lot of Bonanza, too. I liked
Kung Fu in the 1970s, but, again, doesn't seem to be a primary Western. Davy Crockett and
Daniel Boone felt like "mountain men" or pioneer tales. Little "Horse" on the Prairie felt like
family drama to me, not really a Western. Mid-Western, maybe.

I'll stick with maverick because I've enjoyed that series enough to watch episodes more than once.

Bonanza.

Best? Well, I bought the series, Kung Fu and have watched it many times. But it's not the traditional western.

Deadwood was great. Ian McShane. Grittier. Probably more real in that regard. I'd recommend it.

Marverick is always watchable, while some of those earlier ones, like The Lone Ranger, were pretty hard for me to rewatch as an adult. Ugh. One of those "they stretched that little bit into a whole hour" programs.

Aside from the comedies - which one watches for laughs - most of the others are watchable western dramas, but nothing so great I would recommend them as must see TV. They are more filler shows - something you could watch if there was nothing else around.

Still, I did buy Kung Fu, and I would recommend it, even today, so I voted for that. It's more family viewing, too, while Deadwood would not be in that category, though I'd recommend that one, too.

Add another vote for Deadwood.

However, I would like to mention the original Lonesome Dove mini-series. I thought it was very well done. The series itself less so, but that original mini really was quite good.

It doesn't surprise me that some call Longmire a western.

It did surprise me, however, that some called Firefly a western, but I guess I can agree with it.

The original LONESOME DOVE miniseries is one of my top five favorite westerns, period, so I voted for it. Just pretend the sequel with Jon Voight and the series with Scott Bairstow don't exist.

Westworld

Have Gun-- Will Travel starrring Richard Boone was/is my favorite.

I haven't seen too many of those. But I used to record Maverick right after, so I saw a lot of endings. It didn't look too bad.

Absolutely: Have Gun Will Travel

But Richard Boon as the bad guy is quite good, too.
Big Jake (1971)

I really like this movie - but I sometimes get the impression not many others share this opinion. I'm not sure why. It's great.
It's not HD, I suspect, but one can watch this wonderful movie on YouTube in its entirety and for free.

True

Bounty Law

That's quite a variety of series in the poll. And they could indeed all be considered westerns of one sort or another. A surprisingly versatile genre.