Ödön Lechner's independent pre-modern architecture by Els Slots
This nomination includes five buildings three of which are located in Budapest. I only visited two of the three in Budapest and found them both impressive from the outside. I also entered Lechner's most famous building - the Museum of Applied Arts - and found nothing special about its interior. I also know Lechner's Blue Church in Bratislava and find it a shame it is not part of this proposal. I think it too is one of his finest works.
Lechner can be clearly associated with the Judgenstil/Art Nouveau/Secession movement of the late 19th century. Nonetheless, I think he still retained a personal style that be recognized when admiring his buildings.
This said, I don't know how influential or exceptional he was in the history of architecture to make a special nomination for him alone.