Abu Ahmad ibn Adi al-Jurjani: His hadiths are not many, and I do not see any problem with his narrations
Abu Hatim al-Razi: Shaykh, and once said: He is not famous
Abu Dawud al-Sijistani: Salih (righteous)
Abu Zur'ah al-Razi: He is fine
Abu Muhammad ibn Hazm al-Zahiri: He was accused of lying
Ahmad ibn Hanbal: His hadiths are close (to being accurate)
Ahmad ibn Salih al-Jili: His hadiths are written down, but he is not strong
Ibn Hajar al-'Asqalani: Saduq (truthful), but he makes mistakes
Authors of Tahrir Taqrib al-Tahdhib: Saduq (truthful) Hasan al-Hadith
Yahya ibn Ma'in: Thiqah (trustworthy)