Image + Text = TIFF?

Question

I am trying to take a text file that has tags embedded where images are to be inserted. Obviously this output has to be some sort of image or PDF or some other format. I will then need to send this to our fax server, which has native support for converting different files including: Text, PDF, Doc, TIFF, and HTML What solution would you guys/gals recommend? (I am an intermediate C# dev). Any leads greatly appreciated. Thank you sincerely