Vibrato, you are right about Herrmann and Ives. He was a great champion of the music of Ives. Though I have to admit I don't see much influence from the actual content of Ives' music on Herrmann.
I agree also on not being harsh on other composers and don't want to be generally. Except in the case of Horner because of his true plagiarisms - and this plagiarist has been rewarded with an Oscar! That burns me up. He is stealing from real creators of music, and that is a different situation from just being influenced. But in the end he will be found out by history. Because what is the actual content of what he created? SOMEONE ELSE'S MUSIC. Not his own. What did he create?
There is another person right on this Forum - not in this thread, but elsewhere in the Forum - who is a conscious plagiarist just like Horner. He recycles music. He can give you a little Elfman, a little Arvo Part, some Herrmann, some Goldsmith, some Korngold or whatever you want. BUT WHAT THE HELL IS HIS OWN MUSIC???? WHAT IS HE? WHAT IS HIS SOUL? A COPY OF SOMEONE ELSE?
Of course I am sometimes nervous about accidentally stealing music, because today if you do tonal music - even if you do certain kinds of atonal music - there is already so much music that it is easy to do something that sounds like something else without stealing. Also, drawing the line between plagiarism and influence is not always easy to do. For example John Williams. A classical musician I knew said he stole everything, and the guy played excerpts of similar sounding music to prove it. But it is not true in John Williams' case because his own style is instantly recognizable, and his main themes are his own even if sometimes he strays into the realms of the composers he loves such as Stravinsky or Tchaikovsky.
It is similar oddly enough to the stiuation of J.S. Bach, who was NOT a hugely original innovator at all. His music was fairly old-fashioned in his own day, and he was using conventions and alreaady-established musical patterns. But he did so in a way that was so perfect that even today he is considered by many as the greatest composer of all time.