I also don't see any sing of swim bladder. He is not bloated.
I really would try aquarium salt. It also has antibacterial/antifungal effect.
If you decide medications i really recommending the combination of TETRACYCLINE AND FUNGUS ELIMINATORE since he might have bacterial infection secondary to fungus. And the combinations will treat both.
But i think if you already treated him not sure how long time ago it kind of too much medications. I would try to put him in smaller container and do aquariums salt. It will be less stressful for him.
Put him in smaller container. Also i am not sure what is the temperature buy i would keep about 76*. Fungus get worse with warmer temperature.
Pre mix 2 tsp/gall aquariums salt and do daily 100% water changes . Aquarium salt can be no longer than 10 days. You need to pre mix it in one gall jug , shake, make sure it dissolved.