Tyrant lizard king? No thanks, fuck the monarchy. Spinosaurus is cooler anyway (the modern depictions of him, not the terrible Jurassic Park version). 
hell yeah, look at that crocoduck and his powerful tail, I bet he could just smack T. rex with that tail and it would be over.
Did you know a crocodiles tail is just as dangerous at its jaws? That shit is pure muscle for swimming, it can break bones. Big heavy theropods like T. rex are fucked if they get a broken leg.
I prefer herbivorous dinosaurs though. Therozinosaurus is hilarious and I love him.
BEHOLD