Jackie Brown is probably his best because it follows a narrative structure more than the other post modern attempts at films depicting violemce for violence's sake.
Certain scenes are memorable in Pulp Fiction but entertaining or enlightening...not at all. Purely ego driven manic and distressingly meaningless drivel driven by good performances...and that's about it.
I can understand your larger point. A lot of the stuff he directs is merely a carbon-copy of lame Japanese/Southeast Asian cinema.
I remember having a drawn-out, utterly pointless conversation with my brother one time about a particularly dreadful piece of Japanese filler. He claimed that "Ichii the Killer" was an extraordinary cinematic experience; I attempted to refute his argument by deliberately delineating all of the major failings of this film, the chief one being that it was total piece of crap.
We weren't able to come to an agreement but I was satisfied that I had pointed out the glaring failures of this film.
"Jackie Brown" is by far the best Tarantino flick out, most likely for the reasons cited in your post.