Muḥammad ibn Yaḥyā al-Dhuhlī, Aḥmad ibn al-Furāt, and a great many others.
The most elevated chains of transmission in Kūfah ultimately rested with him, together with Jaʿfar ibn ʿAwn.
Aḥmad ibn Ḥanbal said, "His ḥadith are sound and he was personally upright." (1)
Al-Kawsaj reported from Yaḥyā ibn Maʿīn that he declared, "Trustworthy." (2)
Saʿīd ibn Ayyūb al-Bukhārī said, "Yaʿlā ibn ʿUbayd had memorised nearly all—indeed, every one—of his narrations, and I have never seen anyone with a better memory than Wakīʿ."
Abū Ḥātim al-Rāzī remarked, "Among his father's sons he is the most firmly grounded in ḥadith." (3)
Aḥmad ibn ʿAbd Allāh ibn Yūnus said, "I have never seen anyone better than Yaʿlā ibn ʿUbayd, nor anyone who sought Allah through his knowledge except Yaʿlā ibn ʿUbayd—may Allah have mercy on him." (4)
Aḥmad ibn al-Furāt said, "I never saw Yaʿlā laugh at all."
It was also said that Yaʿlā was not meticulous in what he transmitted from Sufyān al-Thawrī.
Ibn Saʿd stated, "He died in Kūfah on the 5th of Shawwāl, 209 AH." (5)

177 – Abū Ḥudhayfah Isḥāq ibn Bishr ibn Muḥammad al-Hāshimī *
The shaykh, scholar and public storyteller—yet weak and unreliable—Abū Ḥudhayfah Isḥāq ibn