2019 Jan-Feb Planning

I’m looking into going to WDW for 2 weeks in mid-Jan to mid-Feb of 2019. I was thinking 1/14-25, after the marathon, but MLK Day falls in the middle of that this year. Going further out catches the Pro Bowl and then, if I understand correctly, several cheer/etc. championships. Is there any data about which of these would most affect crowds?

Thanks,

Shayne