Abu Ahmad ibn Adi al-Jarjani: He narrated from al-Layth and others Munkar Hadiths, and he is among those considered weak. These Hadiths that Khalid narrated from al-Layth from Yazid ibn Abi Habib are all false, and I believe that Khalid ibn Amr fabricated them against al-Layth
Abu Bakr al-Bayhaqi: Weak, rejected Hadith narrator
Abu Hatim al-Razi: His Hadith are rejected, he is weak
Abu Dawud al-Sijistani: He is not reliable
Abu Zar'ah al-Razi: He narrated Munkar Hadiths
Ahmad ibn Hanbal: He narrated Munkar Hadiths, and once: He is not trustworthy, he narrates fabrications, and once: His Hadiths are fabricated
Ahmad ibn Shu'ayb al-Nasa'i: He is not trustworthy
Ahmad ibn Salih al-Jili: Weak
Al-Dhahabi: They abandoned him (his narrations)
Zakaria ibn Yahya al-Saji: He narrated Munkar Hadiths
Salih ibn Muhammad al-Jazara: He used to fabricate Hadiths
Muhammad ibn Ismail al-Bukhari: He narrated Munkar Hadiths
Yahya ibn Ma'in: His Hadiths are not reliable, and once: He is a liar who lies, he narrated fabricated Hadiths from Shu'bah, and once: He abandoned him