Nice clips, Alexatpos; as usual. Love Chico O'Farrill and his orchestra; as you say, classic "fusion" of Latin and Jazz. Fantastic arranger who had a background in classical music composition, which I think shows in the discipline and "tightness" of his arrangements. Clark Terry is fabulous as always. Timeless stuff, while having a definite 50's flavor.
Herb Geller came up before (with Clifford Brown?). Wonderful player; as you say, very swinging player. However, to my ears, he and this ensemble show signs of the "cool" style. His style and that of the other band members, as well as the writing, is definitely "West Coast"; if not especially "cool". What I mean is this: if Parker (and Jackie McLean, Phil Woods etc.) are beboppers who swing hard, and Paul Desmond (and Bud Shank etc.) are "cool" players with their lighter tone and less incisive sense of swing, then Geller (like Art Pepper) occupies a kind of middle stylistic middle ground. "Warm"? Wonderful Conte Candoli..
Some thoughts about this "fusion" thing:
First of all, there is obviousy, and as demonstrated by the last several posts, that there is no reason that the genre (and any other) cannot be posted and discussed ALONG WITH the more traditional styles which, as you say, the "purists" may prefer. Even more importantly (I think), the ambiguity of the term and disagreement of what exactly it is points to what, for me, is always the key issue: the label doesn't matter; is it good music or not? Of course, not everyone likes certain styles; but it highlights the value in trying to understand what it is that makes certain music appeal to some and not others. Integrity of the music and level of craft are things that are not always given enough attention in favor of a purely knee jerk emotional reaction to it. You have always expressed your willingness to "leave the door open" to the possibility of appreciating other styles. Personally, I think that is what it's all about. You may like this:
https://m.youtube.com/watch?v=OC5rB-IwqZk