Abu Ahmad ibn Adi al-Jurjani: One of the trustworthy narrators, and no one refrained from narrating from him. The Imams narrated from him.
Abu Hatim al-Razi: Trustworthy
Abu Zur`ah al-Razi: Trustworthy
Ahmad ibn Hanbal: Trustworthy
Ahmad ibn Shuayb al-Nasa'i: Trustworthy
Ibn Hajar al-Asqalani: Trustworthy scholar, and he used to narrate mursal hadiths (without mentioning the intermediary link in the chain of narrators)
Al-Dhahabi: The jurist, one of the flags (leading scholars)
Sufyan ibn `Uyaynah: He was a righteous man, and there was something in his memorization (meaning he was forgetful sometimes). And once: One of the scholars and prominent figures of Medina.
Abd al-Rahman ibn Yusuf ibn Kharash: Trustworthy
Ubayd Allah ibn Umar al-Umari: I do not know of any problem with him, except that he interprets the Quran according to his own opinion and does a lot of it.
Malik ibn Anas: One of the scholarly worshippers, the pious and religious who fear Allah. And once: His hadiths are like lamps illuminating what is before them. And once: When his hadiths were mentioned, he (Malik) would say: "Those are pearls, strung together," meaning because of their beauty.
Muhammad ibn Sa`d, author of al-Waqidi: Trustworthy
Yaqub ibn Shaybah al-Sudosi: Trustworthy, from the people of fiqh (Islamic jurisprudence) and knowledge, and he was knowledgeable in the interpretation of the Quran