The first thing that distinguishes Mike Leigh’s new biopic from its many predecessors is the cap-doffing honorific: Mr. Turner. Artist biopics often tend towards the surname-only approach, as if the subject was part of a brusque military roll-call: Basquiat (1996), Caravaggio (1986), Crumb (1994), Dalí (1991), Klimt (2005), Ligabue (1978), Modigliani (2004), Pirosmani (1969), Pollock (2000), Rembrandt (1936), Renoir (2012), Tatsumi (2011), Van Gogh (1991), Yumeji (1991).