Abu Ahmad ibn Adi al-Jurjani: He has hadiths and is not rejected in general, and I hope that he is fine
Abu Ja'far al-'Uqayli: His hadith is not preserved
Abu Hatim al-Razi: Shaykh
Abu Hatim ibn Hibban al-Busti: Very rejected in hadith, he narrates munkar (rejected) narrations from famous people
Abu Dawud al-Sijistani: He is nothing, and he once said: Weak
Ahmad ibn Shu'ayb al-Nasai: Weak
Ahmad ibn Salih al-Jili: He is fine
Ibn Hajar al-'Asqalani: Truthful, there is leniency in him
al-Daraqutni: He is considered reliable
Zakariya ibn Yahya al-Saji: Weak, rejected in hadiths
Muhammad ibn Yahya al-Dhuhli: He authenticated him
Authors of Tahrir Taqrib al-Tahdhib: Weak
Yahya ibn Ma'in: His hadith is nothing, and from the narration of Abbas he said: Sayf is more beloved to me than Sinan, and once: Sinan ibn Harun and Sayf ibn Harun are weak and Sinan is more pleasing to me