Between Lana Del Rey and Soul Coughing, which has a sound that includes jazz grooves?
Soul Coughing:  Steve Huey in AllMusic describes the band as "one of the most unusual cult bands of the 1990s...driven by frontman Mike Doughty's stream-of-consciousness poetry, Soul Coughing's sound was a willfully idiosyncratic mix of improvisational jazz grooves, oddball samples, hip-hop, electronics, and noisy experimentalism (described by Doughty as 'deep slacker jazz')."
i don't know