I tend to like jazz that leans more latin, like Chuck Mangione or Arturo Sandoval. They're both typically a little more upbeat than the example you gave, but of the two Mangione is definitely chiller than Sandoval, some of Sandoval's stuff gets pretty frenetic.
The Flugelhorn is such a beautiful instrument! I almost had a chance to play a solo on one in my high school marching band, but the first chair trumpet stole it from me, lol.
Its not your traditional jazz, but there is a creator called "take your time" that has been making some great stuff. Here is my favorite, "Jazzy but not too jazzy" Perfect to have on in the background.
I'm particularly partial to the band Bohren & der Club of Gore, who play "dark jazz". Imagine the kind of jazz you'd expect to be playing at 3am in a smokey, forgotten jazz club where cynical private detectives go to drink away the memories of the one woman who got away.