There was a poll on DCP "Top Ten Shows of all Time" that ran from late 2008 through 2009. The results of that poll were telling. There were many great shows represented throughout the past four decades.
The top 25 nominated shows included 4 Jim Wren shows (89, 96, 91 & 93 in that order). I think this outnumbers any of the other arrangers. There were 3 JD Shaw years (08, 03 & 06 respectively). There was 1 Wayne Downey year ( '94 - ranked 25th out of 25).
I know that those shows are the result of much more than just brass arranging, but I agree with the results of the poll. And I think Jim Wren is the master. Unlike others mentioned in this thread who write to the sheets, Jim Wrote to the audience.
MIM