Are the Sunnis divided into two groups: one that prefers the two Sheikhs and Uthman over Ali, and the other that prefers the opposite and does not recognize certain Sunnahs or some scholars?

There is no disagreement among the People of Sunnah regarding the superiority of Abu Bakr and Umar over all other Companions. The majority of the People of Sunnah prefer Uthman over Ali, while some prefer Ali. There is no Sunni who does not recognize the compilers of the Sunan, and Al-Tabari and Al-Qurtubi. It is advised to avoid the doubts raised by opponents for those who lack knowledge and the ability to refute them.