Difference between Sad Sack and Bungler

SAD SACK vs BUNGLER: NOUN

Grumbler, Cameoing, Yankee doodle, Mule skinner, Hepcat, Monocled, Gloomy gus, Nostalgist, Dunderhead, Botcher, Fumbler, Butcher, Blunderer, Bumbler, Bungler

Simpleton, Dullard, Dissembler, Oaf, Dolt, Prevaricator, Dunderhead, Nincompoop, Buffoon, Botcher, Butcher, Fumbler, Sad sack, Blunderer, Bumbler

Mopsy, Meany, Grumbler, Cameoing, Yankee doodle, Mule skinner, Hepcat, Monocled, Gloomy gus, Nostalgist, Dunderhead, Butcher, Blunderer, Bumbler, Bungler

Ignoramus, Schlemiel, Simpleton, Dullard, Dissembler, Oaf, Dolt, Prevaricator, Dunderhead, Nincompoop, Buffoon, Butcher, Sad sack, Blunderer, Bumbler

Mauldin's foot-slogging pair did not Sergeant York the enemy's machine gun nests, nor did they sit on Sad Sack haunches, looking helpless and beaten.
I've just started a new job - it's only my second week and i'm walking around like a sad sack.
The 65 episodes for Yorkshire Television included the characters Sad Sack, Hi-Fi, Lucy, Dotty, Back-to-Front and Princess.
Underwater, a lump appears on Sam's head, and the Sad Sack lands on top of him.
It is very difficult to make a living by being a professional sad sack and victim.
Is it better to be a sad-sack or a maniac?.
Follow these tips to avoid looking like a sad sack.

The shot was fired, but fell short of its aim, and the gunner was cursed as a bungler.
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MARPLOT, an officious bungler, who spoils everything he interferes with.
Huddler, a Bungler; alfo one that plagues others.