Cake suggestions please!!

I need help. Its my Dads birthday in a couple of weeks and I want to make him a super amazing cake. I have no idea what kind to make. His favorite kind of cake is an upside down pineapple cake, but for his birthday i was thinking something a little more fancy. I was originally thinking cupcakes but I did that for my brothers birthday. For dad I'm picturing something with lots of layers, super tall with loads of delicious frosting/fillings. Any ideas, suggestions, tips, pointers?? Please let me know..

My brothers birthday cupcakes (happy 21st little brother)