So apparently, according to a recent poll (1000 men and woman) the one person people most want to provide music for AKB and Kyary Pamyupamyu is...
...Tsunku.
http://www.musicvoice.jp/news/20140624015417/
He also ranks at #8 for SMAP and #4 for Arashi.
http://www.rbbtoday.com/article/2014/06/24/121178.html