I'll kick off with a big model I have converted a couple weeks ago already: Ëylon Gnosis the Apostate. The idea is that he is a Keeper of Secrets who now serves Nurgle together with the rest of the Honoured Decaying Mother's court.
The model is based on a Mierce miniature, with some parts taken from a Maulerfiend and some Ork Dread bitz. I am very pleased with the pose of the finished miniature, and its mere size is impressive.