The antibiotics you mentioned are the first level of treatment for pouchitis- Cipro, Flagyl, Xifaxin, Augmentin, Levacquin, Keflex, Docycycline, Zithromax, etc.
The second level of treatment are the biological drugs like Remicade, Entyvio, Stelara, Humira etc.
Other treatments that can be used are Budesonide, which is available in both capsule (Entocort) and enema format as Rowasa enemas, steroid enemas (Cortenema) and probiotics. Some people are able to use probiotics alone to treat pouchitis, although in most cases it's merely a secondary supplement and is dangerous to use as stand-alone treatment for active pouchitis. Fecal transplants are another option, although one doctor told me that "it's nothing more than a powerful and ultra-expensive probiotic", and its efficacy in treating pouchitis as opposed to the other options is questionable.
Those are the primary treatment options. I was on rotating antibiotics for 25 years, which suppressed the symptoms but did not completely stamp out the inflammation. Starting in 2015, I had better success with Remicade. Remicade is typically, although not always, the first biological drug used on J Pouches, due to there being more clinical data on its efficacy with J Pouches. But other posters have also used other biologics with success Remiacde is administered via an infusion. Humira is self injected in the thigh.
Good luck.