Ishant has the best figures of the three lately, incidentally. Despite that phase in South Africa where his pace dropped below 80mph and he bowled a no-ball every over.
Look, you have two things to work with- you can look at their stats, and you can watch them bowl. Everyone on CW uses a slightly different combination of the two, and bases their judgments around their own interpretations of what constitutes good evidence. That's where a lot of the disagreements pop up.
But in this case, it doesn't matter what your combination of the two is. Their stats are almost identical, so there's not much to go on there, and Broad indisputably looks like an infinitely better bowler. Where's the point of conflict? The only way you could make a case for either of the other two is by deciding that, despite a sample size of about half a match, the stats matter 100% and the perceived quality of their bowling matters 0%. It's just not close. If you think it is, I can only assume that you haven't watched them both bowl enough in the past 18 months.