Sosa's role in the '98 home run chase was incredibly important - a moment which, I might add, Bud Selig, MLB, and the sportswriters were more than happy to cash in on at the time. I don't know how that doesn't qualify as "iconic" or "being an ambassador of the game."
And sure, we can make assumptions about Sosa's accomplishments, but the fact remains that the "proof" for Sosa is the exact same "proof" for Ortiz, and I think it's incredibly unfair that Ortiz gets a pardon from Commissioner himself and Sosa is left to hang in the wind.