He was a big man!
Sounds good so far. When I was seven or eight years old, I was all for watching tv shows about a man, especially a big man. Especially a big man who was a "dream come-er true-er."
But Batman was on the other channel. No kid in his right mind would pick a cowboy over the Dynamic Duo. I never saw a single episode of Daniel Boone (1965-70) when it originally aired.
I've seen one since, for research purposes. Not a lot of gay content. Not a lot of cowboy content, either.
2. He has a sidekick anyway, Mingo, one of the least convincing Native Americans on tv, actually played by singer Ed Ames (who, although Jewish, became famous for recording the Chrismas song "Do You Hear What I Hear").
3. It's not even the Old West. This is Kentucky during the Revolutionary War.
Prior to Daniel, Fess Parker had starred in other Disney productions, notably Davy Crockett, Old Yeller, and The Light in the Forest (ignoring the crush of James Mac Arthur). Afterwards he retired to run a vineyard and give conservative speeches.
Magnum P.I. clone who keeps encountering nude women and swishy gay stereotypes while trying to solve a murder. At least he looks good semi-nude.