Between Lana Del Rey and Soul Coughing, which has a sound that includes jazz grooves?
Lana Del Rey:  Her music has been noted by critics for its stylized cinematic quality, its preoccupation with themes of tragic romance, glamour, and melancholia, and its references to pop culture, particularly 1950s and 1960s Americana. 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')."
Soul Coughing