Abu Hatim al-Razi: He was a Companion
Abu Hatim ibn Hibban al-Busti: He was a Companion
Ibn Hajar al-'Asqalani: A Companion, and he said in al-Isabah: His name is disputed and he is famous by his kuniya
al-Mizzi: He was a Companion
Muhammad ibn Isma'il al-Bukhari: He was a Companion