It would be difficult to prove that the noise was his fault, or that he could do anything about it. Even if he tried to evict them, it would take about two months in most U.S. states. The proper defendant here is the problem tenant - sue them.
The landlord could sue the decedent's estate.
You cannot sue your landlord unless you suffered damages due to his negligence.
See answer to related question, "Can a tenant sue a landlord for trespass?"
You can get (sue) anyone for slander: your landlord is no different.
Sure.
Your landlord can evict you and sue for back rent.
Yes the landlord can be sued for breaking the lease.
Yes.
You can sue the landlord for slander.
America's Court with Judge Ross - 2010 Fight Night Noisy Landlord 3-125 was released on: USA: 2013
You can try.
yes