>He had the strength to resist pulling away the microphone from those insane kids
You can say the same thing about a corpse.
>and he had the strength to resist running third party and handing Trump the election in the process.
Endorsing a candidate that goes completely contrary to him is something else entirely.
>He had the will to humble himself and swallow his pride even when it did not look good.
Once again, you don't need any will to do that. Lack of it will suffice.

Do you have the strength/humility/whatever to commit suicide?
(Those aren't the nouns you'd expect in that sentence, right? It doesn't make sense.) Passivity is not inherently heroic, turning your back on a cause people ruined themselves for is not heroic. But sure, you're a #HillaryMissile now.

>So you are right, this does sum him up quite well: a man willing to swallow his pride to do the right thing even if it does not look good.
Considering what Hillary stands for, I can't see it as the right thing.