He broke into print in 1928 with "The Metal Man" (collected in
The Best of Jack Williamson), was named the second Grand Master in 1976 after Heinlein and won his last Hugo in 2001 (I believe) with "The Ultimate Earth". Kept writing until he died in 2006. He also seemed like a very interesting person. To actually ride out West in a covered wagon and then go writing about rockets to the stars and then to see moon landings and computers and whatnot is quite a journey.
That said, he rarely lit me up in an extreme way. He has my esteem and appreciation more than my fanaticism.
For me, I've got
The Early Williamson and
Golden Blood, which I've yet to read. I have read
Darker Than You Think,
The Humanoids, the
Seetee omnibus (containing
Seetee Ship and
Seetee Shock), the collection
The Legion of Time (containing "The Legion of Time" and "After World's End"), the
Three from the Legion omnibus (containing
The Legion of Space,
The Cometeers, and
One Against the Legion), and
The Best of Jack Williamson. I recommend them all but LOS, DTYT, and Humanoids are probably the most objectively "classic". Also, of course, TBO, for all that it contains. After that, probably the Seetee books (aka CT aka contra-terrene aka anti-matter) and the Legion of Time.
Unfortunately, Fried Egg, I have read
Brother to Demons, Brother to Gods and didn't like that one. (That and
Manseed are the only ones I've read, AFAIR, that I didn't like.) I can't remember why, really, but it just didn't impress. But maybe that's just me and you'll enjoy it.
"With Folded Hands..." is included in The Humanoids, being the final tale of the original set....
That's only true of some editions and it was the first tale. "With Folded Hands" was published in the July '47
Astounding and then was followed by the serial "And Searching Mind" in the March/April/May '48 issues. Only this last was revised and published as
The Humanoids in 1949. Then some editions did add the original story as well, I think starting in 1980, when he wrote a sequel to both,
The Humanoid Touch, which I never bothered to read.