Sir Francis Drake was a privateer, he had Royal warrant to do and behave as he wished as long as he brought Liz that Spanish gold.
Well, according to you English types. :) According to the Spanish, he was a pirate. Tehcnically he was a pirate anyway, since he didn't get his Letters of Marque until after
he returned to England with a king's ransom in Spanish gold. Queen ELizabeth issued them retroactively. :)
I'll add a few more names, though:
Henry Morgan (technically an English privateer, pirate according to the Spanish)
Black Bart Roberts (100% pirate, also made his crew observe the Sabbath and held prayer services on a regular basis on his ship).
- Calico Jack Rackham
- Anne Bonney (Calico's lover)
Side note, in many cases the line between privateer and pirate was extremely thin - most privateers committed piracy when the terms of their Letters were expired. And only Henry Morgan is known to have carried his Letters on his person at all times. :)