As you want to get the list of some of the best part time courses in Management and Finance sector after B.Com so here is the information of the same for you:

There are lot many courses

Starting with you can do part time Master of Commerce

There is one more option to do MBA part time

Also there are options like going to diploma courses like in the banking sector, trading area.

You can also pursue courses like CA, CS etc. Many of the courses are available in correspondence.

So it would be best if you work along with pursuing any of these courses.