Good question. I don't follow basketball super-closely so who is officially the "long-suffering" fanbase now? Sixers? Pacers? Suns? (Not in terms of longest-suffering but in terms of the first team you think of)
Todd in the Shadows
Curious, since there are no NBA teams on your list, if the Knicks do finish off this championship, who becomes the new most suffering NBA team/franchise/fanbase?
Maybe the 76ers and their current stretch of never getting past the 2nd round