What's your opinion on these often ridiculed music artists?

Glenn Miller
Pat Boone
America
Bread
Asia
Starship
Journey
Steely Dan
Air Supply
Yanni
Barry Manilow
Michael Bolton
Kenny G
Celine Dion
Jack Johnson
Sarah MacLaughlin
Jason Mraz

I was browsing on some music forums today and these artists are consistently included in the lists of music artists considered extremely bland and middle of the road. Although I agree to an extent, there’s a handful of tracks I legitimately like from each of these artists. What about you?