I have had No luck with TV Show Addresses. I have done at least 4 while they were filming and never heard back. So I quit doing them, and hate when other get replies lol. what can ya do
You have FanBase, I always figured those to be for quick, "cheap" PP.. Though if you get other PP it's great. (pre-print / personal pic *this being other*). you'll most likely have a person the writes similar to that person and they write your name and such. But there is that chance (which you may never know) that it'll be fully legit

Record Labels, ok.. I have written 3 of them before.. more or less 3. And never heard back. They are about to be like TV Shows. I get so bad about a no-reply. Yet for some artists, it's the only address

agencies / management.. i think they are the best bet. but there are fails there too.
their own "companies" there are the few handfuls that have their own production coms. or whatever. I believe I have tried them once and nothing. So I cant say much great on it.
As you can see i have been balling when I can spare the $ and time for this great hobby. but what is thee best way to mail out to the people?? I have 1 currently going to a direct address, one going to management com., and i'm think of taylor swift but there is only fanbase which was pp (pre). then her company.. I dont know which one to go after. Thoughts?