Abu Hatim al-Razi: Abandoned in Hadith
Abu Dawud al-Sijistani: Liar
Abu Zur`a al-Razi: Lenient
Abu Nuaym al-Asbahani: Lenient in his Hadith
Ahmad ibn Hanbal: Not trustworthy, narrates calamities in the time of Uthman
Ahmad ibn Shuayb al-Nasa'i: Abandoned in Hadith
al-Daraqutni: Abandoned, and once mentioned him in the Sunan as weak
Sibṭ ibn al-Ajami: A Rafidhi, not trustworthy
Ali ibn al-Madini: Fabricates Hadith
Muhammad ibn Isma'il al-Bukhari: Not strong according to them
Muhammad ibn Abdullah ibn Numayr: Almost a Rafidhi
Yahya ibn Ma'in: Good for nothing