So you like cotton candy more than Turkey, steak, fish or tasty veggies.
That's all.
No one is ever going to rate cotton candy over seriously good food.
That's what your composers are, film music, video game music, pop music sweet, one-dimensional 'exciting' or sentimental. They are very fine craftsman who write popular music.
They are classically trained, and like many a film composer, they write music which is almost entirely derivative, though technically 'original' - theirs are not the voices of a profound original artist earnestly writing 'art music.'
Classical music, past and present, is based on a premise of being more intellectually demanding and challenging - not to be elitist but to state a fundamental difference between the genres of classical to 'other' musics, including those you name which have a lot of the outer characteristics of some classical music.
Your named composers are not better than the 'great' composers, they are not even attempting to write to that end, with the intent to be considered classical, and would probably, in person, be the first to tell you that.
They are certainly not better than other contemporary classical composers, who are no more fossils than are your video game / film score / popular orchestral instrumental composers.
They cannot compare, to keep your nationalist priority going, to the recently deceased Toru Takemitsu, whose music is internationally renown and highly respected within the classical music community
Toru Takemitsu ~
Green, for orchestra
http://www.youtube.com/watch?v=O-cC8lWzWfo
The Dorian Horizon, for seventeen strings
http://www.youtube.com/watch?v=x4hMYQ_D7GQ
... or the living contemporary classical composer,
Takashi Yoshimatsu:
Threnody to Toki
http://www.youtube.com/watch?v=1THvmUseQ1M
Symphony No. 5, third movement
http://www.youtube.com/watch?v=keyeBz_Se3Q&feature=related
Your choices compose 'pop' or 'light' symphonic music and you like pop symphonic music, that's all. They are commercial composers who also compose 'to order' any way that is required of them as per the job demands, a bit of jazz, a bit of quasi-contemporary classical, etc. That type of composer, with many equal counterparts in commercial music in the west, rarely has a style of their own one could call an individual or unique 'voice.'
Now, expect the world to bow to your taste as the highest and most refined? Then you've got a bit of an ego problem. Casual and devoted amateur fans of light fare do not get to choose who go in the history books of the great and earnest artists, past or present.
Best regards.
P.s. "I went to Y/A and got told by Petr." LOL! Don't know if I like that, but it is really funny. Hope you like the other music by Takemitsu and Yoshimatsu!
P.p.s. You can safely bet 10,000 Yen that Nobuo Uematsu and Masashi Hamauzu know of both Takemitsu and Yoshimatsu and hold the work of both composers in the highest of esteem. Neither Uematsu or Hamauzu would ever expect Yoshimatsu to have any great respect for their work because they know exactly where their work stands in the overall scheme of 'great music.'