I think this was one of Kamal el Makki's first ever lectures, because i heard this before Ramadhan last year. I don't think it's full, but it's funny and interesting masha'Allaah.
I think you'll find all of them beneficial insha'Allaah because their all about Ramadhaan, but totally different in what areas they cover.
For example the kamal el makki one is about eating in Ramadhan, whereas Sheikh Zahir's is about preparing for Ramadhan and Yasir Qadhi's is about what is allowed and disallowed within Ramadhan etc.