Gus Fring was a major antagonist in Breaking Bad until his death. He appeared to be a legitimate businessman, as the owner of Los Pollos Hermanos, but was discovered to have been a drug kingpin.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...