Abu Hatim ibn Hibban al-Busti: He narrates fabricated stories from the Egyptians. It is not permissible to use him as evidence under any circumstances.
Abu Zar'ah al-Razi: A righteous man, one of the best Muslims.
Abu Abd Allah al-Hakim al-Naysaburi: A fabricator of narrations.
Abu Nu'aym al-Asbahani: An Egyptian sheikh. Yahya al-Khalani narrates from him in 'al-Manakib'.
al-Dhahabi: Fabricator