Bah! In my opinion, in his better works Bob is a fine and full heir to such Appendix N luminaries as Lin Carter, Andy Offutt, and L. Sprague de Camp! Upholding the noble tradition of also-ran swords & sorcery writers.
Not everyone can be Leiber, Moorcock, Anderson or Wellman, after all!
I can see you writing a blurb for someone today-
At his absolute best, this writer almost approaches the quality of writing of some of the lesser-known and lesser-quality writers of science fiction during the 1930s, with prose that sometimes comes uncannily close to the third-best short story in Astounding Stories of Super-Science.
To get absolutely real for a second-
Salvatore is a commercially successful writer. He makes money writing. That immediately puts him in the upper echelon of all writers. That is no small feat. It's similar to a musician who supports themselves making music ... simply doing that, regardless of subjective opinions about "quality" is a remarkable achievement in this world. He can generate perfectly cromulent text, and a lot of it, that people will read.
But the actual writing is insipid. It is full of borrowed tropes, poor characterizations, and worse plots. It is certainly not successful as "literature," and certainly does not aspire to same. It is not great compared to other fantasy writing that isn't "work for a brand." And it's not even particularly good genre/pulp writing; other than some small facility with combat, there is nothing particularly propulsive or interesting about the writing from a pulp or genre perspective. Comparing his writing to writing from nearly a century ago in the same genre ... does it no favors.
And again, this is the best of his writing! Some of the worst is just terrible. Like ... really bad. One of the people that I ran D&D games for a few years ago (they were first year high school at the time) was a voracious reader and picked up one of his books at a Friends of Library sale, and told me that they couldn't finish it because it was so bad.
Look, people like what they like, right? Danielle Steel is one of the best-selling authors of all time. Kanye's ex, Julia Fox, had a book out that was ... well, it was something, and people bought it. If you are "ride or die" with Team Salvatore, then enjoy it! Some people like Hummel figurines. Some people like Kinkade paintings. Some people like
Love Island. Who am I to gainsay Milton Friedman's invisible crushing hand?