Which Star Wars original trilogy character is the lamest?

[Middle-aged Europe]

Only Tagge and Ozzel ring a bell, actually.

Ozzel is an interesting case because one intepretation is that Vader didn't really kill him on a random whim, but rather because the admiral was indeed arrogant and incompetent. As the saying goes, Vader was actually quite fond of his successor Piett, who supposedly was a much better officer. So Vader simply didn't bother with demoting or transferring Ozzel (or as another source implied, Ozzel might have been too well-connected to get rid of him through proper channels).