IF, and this is a big 'if', your needs are for a limited number of documents and the real objective is just getting the text (as opposed to the real objective being developing a text extraction tool for long-term use), for example for indexing,

then a very low-tech solution might suffice:

• open the pdf in Acrobat (not Acrobat Reader, Acrobat)
• under 'View' select 'Continuous'
• under 'Edit' click 'Select All'
• copy & paste

Takes about 20-seconds per document. The math on time investment is easily done. I once used it instead of developing a module to extract pdf text for indexing pdf files in an index-based search engine before direct pdf indexing was commonplace.