I can’t help but feel that a villain who makes time in his nefarious schedule for taking his, er, pooch for regular walks can’t be *all* bad. Likewise for a rogue who appreciates the cleverness and joie de vivre of a raven.
In the mid-70s, The Clown Prince of Crime held his own book for ten issues (nine of which appeared at the time… the tenth only seeing print in… 2019!), and its stories chiefly (and rather winningly) focussed on his squabbles with other members of The Batman’s rogues’ gallery (certainly the finest in comics). I haven’t followed the dodgy shenanigans of the back issue marketplace in decades, but I was amused and bemused by the lofty prices that this otherwise-innocuous little series commands. Overflow from his cinematic popularity, perhaps?