My last figure to complete my loose (77) run was the super cool B Wing pilot.
I deliberately waited to get him, as he was my last vintage figure Christmas '84 so it only seemed right.
If major variants count, it was the VCJ, which I added after 25 years of collecting. On regular basis the last one I completed was Lando General as well. Had the figure already but took me some time to complete it with a blaster.