Combine Multiple Worksheets Into New Worksheet Without Duplicating Columns

I wanted to see if it were possible to combine multiple worksheets into one new worksheet, but without duplicating columns with the same heading, enabling the data to fall into the correct column if it's shared in multiple worksheets, and adding columns if their unique. Furthermore, if there are a few "leading" columns, i.e. ones that are shared in every sheet and never move from where they are, to include those as the leading columns in the new sheet. I'm unable to post an attachment, but I'll try to paint a picture. This is on a much smaller scale than intended, but I want to combine Sheet 1 and Sheet 2 to form Sheet 3 (which I've manually copied to look how I would want it to look if the formula/code works properly). Columns A, B, and C are the "leading" columns I was referencing, whereas any of the following columns may or may not be shared in the various worksheets, but should still be included and combined if they're the same. There also might be a different number of columns depending on the sheet. I consider myself somewhat of an intermediate user, and I am familiar with using VBA codes for formulas should that be the proper remedy.