Abu Abdullah al-Hakim al-Naysaburi: The most knowledgeable scholar of Hadith in Khorasan during his time, and most of our Sheikhs traveled with him. He has the most stable origins and the most accurate hearing.
al-Khatib al-Baghdadi: Reliable, accurate in hearing, good in origins, travelled a lot. Everyone who wrote about him said he was trustworthy in Hadith and virtuous.
Abd al-Rahman ibn Muhammad al-Daraqutni: Trustworthy in Hadith, virtuous.