I swotted up
"But one Democrat who is working with the campaign said advisers have talked about a final-night convention tableau that includes 'two husbands and two wives,' in an effort to deflect the character issue that plagued Clinton during the primaries. If true, that would eliminate Kerrey and Richards, who are divorced."
https://www.washingtonpost.com/arch...g-mates/e97c3ac4-9d80-46b0-a700-858998245ddb/
"The length of time they had with candidate Clinton seemed to be indicative oftheir place in the pecking order-—Gore got three hours, Graham and Wofford two apiece, and Hamilton just one. By the time Kerrey got down to Little Rock, Clinton had pretty much made up his mind..."
https://books.google.com/books?id=XH4Os4Cjr-cC&pg=PT127
The top thing certainly appears to be a possible minor factor, even Kerrey acknowledged it might have been, I look like I've mis-remembered on that part. (Though Clinton aides later denied this after the reports you cited, it's worth pointing out, but that was likely in the interests of ego-smoothing of course - Kerrey was a sitting Senator, after all) I doubt it made much difference in the grand scheme.
All my sources point to the other options being less oh-so-conveniently tiered like your does, btw. James Carville, he who had managed Wofford's senate campaign, was for Wofford, and I think Begala was for long-shot Mario Cuomo. Not too relevant mind, considering how Bubba kept the campaign operation at arms' length on this one, but equally I'm not sure where you're getting this heavily implied Bob Graham-as-fallback thing.
"Gore was no doubt the favorite but had he done worse in the interview (just a bad day...) I don't think Graham or Wofford are inconceivable.
Gore's interview took place at eleven o'clock at night, (In a suite in the Capitol Hilton, of all places) and Gore wasn't a night person. So I'm not really sure how bad an interview you're expecting. In any case 'interview' is a bit of a misnomer, it's been variously described as 'a strategy meeting' and 'two college budies hanging out together'. Pretty much instant chemistry.
Anyway, you've totally ignored what I stated above about Gore fitting Clinton's stated requirements before the vetting process began, or the many structural factors working towards Gore being chosen. This simply wasn't as open a choice as you're presenting it, sorry. And even if it was, I'm not seeing Bob Graham as the second choice.