Any Shia ppl on gs.

read the book first and then comment on it ....

Hisham b hakam was the one most commonly associated with imami 12er theology , and the disgraceful practice of sabb-e-sahaba.Yes he does predate safavis and 12er shiaism evolved to its present form over centuries.What I mean was the state ideology of 12ers was finalized during this time as for the first time it got a clear majority in a muslim country.
A lot of sources for 12ers are actually common with other muslims so that hardly counts as purely 12er works.