and welcome to the family. Honestly, the best class, is always going to be the one you enjoy playing most. We seem to have a pretty well rounded server in regard to needed characters to make nice squads and run our content. So, Jump in make what makes you happy and have a blast !!
as a footnote, you can go to your user panel, and down the left side, look for statistics, and along the top margin is the number of characters of each class for you to see where each falls numbers wise if that helps also. CHEERS