Just a reminder and point of benefit that the Four Imaams:
1. Aboo Haneefah (d. 150H)
2. Maalik Ibn Anas (d. 179H)
3. Ash-Shaafi’ee (d. 204H)
4. Ahmad Ibn Hanbal (d. 241H)
All came before and died before Imaam al-Bukhari, who died in 256H. And their madhhab which they clearly said to their followers, was the Sahih hadith, even if that Sahih hadith went against their own opinions.