What would be the status of someone who favors Mu'awiyah or any other "sahabi" other than Abu Bakr, Umar, and Uthman, over Ali (as)?
And who is better, A'isha or Fatima (as)?
There is a topic worth discussing.
We as rational human beings do not believe (in a lot of cases) that a person can be better than another person in the absolute sense.
For instance, it is VERY unlikely for me to be better than my brother in every single thing, (better shaped nose, better at math, better muscle tone, superior business skills etc...)
In the same sense, we apply this to the Companions who were average human beings, Ibn Mas`ud was top-notch in Qur'anic recitations, Khalid is an expert warrior and strategist who never lost a battle, Aba Musa possessed a majestic voice when reciting etc...
Now believe it or not, Mu`awiyah is said to be much better at government and politics than all his peers. However, to make a general statement and say Mu`awiyah is better than aba `Ubaydah, this is cartoonish and unacceptable. There are a ton of Companions who are superior to Mu`awiyah in piety, virtue, merit and earliness in answering Islam's call.
Our issue with the Twelver Imami Shia is not related to them placing `Ali over others, a few of the original Shia held this view as well as some of the Predecessors, not a problem and it isn't much different than having your favorite character in a show; it's subjective and not every character has the same appeal (I may favor `Umar for his strictness or `Uthman for his leniency).
Our issue as you know, is the attack against personalities who are viewed as most pious and beloved to the Prophet (saw) based on dubious sources and shaky stories, all the while dismissing the authentic and mass-transmitted reports.
Similarly, the question of Fatimah (as) and `A'ishah is "who is better"?
Fatimah (as) was more beloved to the Prophet (saw) as his own daughter and she had a greater place in his heart. While `A'ishah is very much loved as his wife and the mother of believers. On the other hand, `A'ishah is superior in her knowledge as one of the few early female scholars who was often sought for her verdicts while Fatimah (as) was mainly known as a devout worshiper.