Can somebody tell the directors of Scandal PVs?
As far as I know:
Space Ranger , Koi Moyou (anime ver.) , Doll and Sakura Goodbye are directed by Ugichin
Shojo S and Yumemiru Tsbuasa by Yuu Shinagawa (the pilot in Yumemiru)
BEAUTeen!! by Kyotaro Toyoda
Shunkan Sentimental and Namida no Regret by AT
Taiyou to Kimi ga Egaku Story by Masaaki Uchino
secret base (Kimi ga Kureta Mono) by Atsushi Nakai
Scandal Nanka Buttobase by Yu-ya Hara
Pride by Jasuhiko Shimizu
CUTE! (Scandal meets Cinnamoroll ver.) by Hosoya Gen
Haruka by Kensuke Kawamura
Love Survive by Smith

I'm completly clueless about Koi Moyou (the newer one that filmed at Izu Studio ), Koshi-Tantan (motion capture anime ver.), Haruka (Tofu Kozou Special Music Video), Scandal no Theme and Dobondobondo no Theme.

I'm definitely think these stated at the liner notes, which I'm unfortuantly didn't have. So if you have Best Scandal, Haruka (limited edition A [ESCL-3661]), Baby Action or Video Action then please check the liner notes. These shoud be in English (at least they are in Sakura Goodbye, Shojo S and Shunkan Sentimental), but if not search for "映像ディレクター".

Speaking of directors, since Yumemiru Tsubasa is my favorite PV of all time, I'd love to see Yuu Shinagawa direct their PV again.

He did Shoujo S, so HARUKAZE maybe?

I love it too but don't hold your hope too high, because Japanese Wikipedia says he directed his last PVs in 2009.

Ohhh that's news for me xD So one of the last PVs he did was Shoujo S and Yumemiru eh.