Directly to your bank account is quite easy. You can just use an exchange that accepts fiat. You have coinbase, gemini, and a few more that can be used for this. You can use them to sell your coins, and then send the money to your bank account. Neteller is a viable option as well, to send bitcoin to a bank account. In this case they sell it automatic, you just need to choose the option to credit the account with bitcoin, and they will exchange to fiat immediately, and from there, you can send it to a bank account, or any other merchants that work with neteller (neteller only accepts BTC though, and not ether).

As for transferring directly to paypal or western union, I don't know any. You can use the forum, in the exchanges section, and you can find a trusted user that could do that for you, but there is no direct method as far as I know.