Hint #1: an oxymoron is a figure of speech in which apparently contradictory terms appear in conjunction such as "jumbo shrimp" and "wise fool"
Hint #2: the five theme answers all start with a surname... do these people have anything in common?
Hint #3: the five theme answers all end with a word... is there anything "shade-y" that they share in common?
Hint #4: combining hints #2 and #3 would lead you to a comic book character
Hint #5: the answer to the meta is a two-word catchphrase of this comic book character... one of the two words is hinted at by the sentiment of the clues of the five theme entries which follows a certain pattern
Hint #6: the clues progress through the five stages of ___ (deep sorrow)