[Avodah] Rishonim on God's Corporeality

[Harvey Benton]

There is an Article online by R. David Sedley, bringing sources from Talmud through Rishonim on their views of Aggada.  Some Rishonim [pg. 116 of link] held to the Literal interpretations of Aggada, including R. Yosef ben Todros, and possibly R. Yonah; to not believe this they held, is to degrade the Torah. 

One of the Tosafists, R. Taku, holds all Aggada are to be held LITERAL, and even the ones that say God has a body. (The other Rabbeim mentioned in the article do not explicity say this, but it may be that they believed it, as per the article).

R. Taku is mentioned by the Ramban, Rama and others. His book was written to challenge the denial of God's corporeality as brought down by R. Saadia Gaon, and the Rambam. (He has very strong words to say against them, and their interpretations [Pg. 117-118 of link below]).
http://www.hashkafacircle.com/journal/R2_DS_aggada.pdf

I have never heard of any legitimate Chazal that actually believes God has a body; does this train of thought precede the Rishonim?  And on what basis have we, as post-Rishonim Jews, rejected the idea of God's corporeality, in favor of the train of thought that rejects such a notion?  (As evidenced by the Yigdal prayer, Rambam, etc.) HB