What title is appropriate for my new consulting company? President?
CEO? Principal? It is a cunsulting group focused on HR, ERP and IT.  I
don't want it to sound like a small Mom and Pop shop.  Thanks

It depends on the legal aspect of your company. If it is a Limited
Company (Ltd) or Incorporated (INC) company then CEO, Managing
Director or President are correct and recognised by the relevant
authoritities. By the sounds of it you are a one man (or woman) band
and probably not registered. So why dont you stick with the safe
ground;
HR consultant
IT consultant
Consultant or
Owner

I tend to change my title to match the audience. Some people want to
know they are speaking with the owner and some others want to know
they are speaking with someone technical, so I then become the
technical director.