LLC is the most flexible type of business entity thanks to the fact that LLC members can keep the company taxed as a partnership (or disregarded entity if single-member LLC, both default forms of taxation), or instead elect it to be taxed as S-Corporation or even C-Corporation, if company owners' taxation goals work best with these types of taxation.
Any corporation is taxed as C-Corporation by default, and can be elected to be taxed as S-Corporation, provided all shareholders are U.S. persons, etc (read here for a list of requisites for S-Corporation).