I think that I'll go with Albertosaurus. I know I voted Spinosaurus last time, but looking at Suchomimus its jaws are even narrower, probably no good for strong bites against animals almost as big as itself. It may have been bigger and had bigger hands and claws, but Albertosaurus had a skull built for meat eating and probably killing.
The suchomimus rests by the river. It sees something and turns. Its an albertosaurus. The suchomimus charges and grabs hold of the albertosaurus neck, but it's muscles protect it from its weak bite the albertosaurus jumps away and rams the suchomimus then it crunches it's neck.
According to palaeos.com, Diplodocus was 'only' about 10 tonnes, while some propose a weight of up to 70 tonnes for Paralititan. Of approximatively equal length, Paralititan was much more massive; my vote goes to Paralititan.
That could very well be, but the Diplodocus was far more obnoxious.
D: "Hey Paralitwitface, bet you can't do this with your big fat ugly tail!" *whips with tail, runs away* P: "Oh yeah? Wanna bet?" D: "You're too fat to catch me!" *whips with tail again, runs to a safe distance* P: "Quit it!" D: "What are you gonna do about it, wideload? My great-grandmother can run faster than you, and she's a cyanobacteria!" P: "Why don't you come say that to my face, diplodoofus?" D: "Okay!" *bites Parali's neck, then turns to run away* P: "Alright, that's it!" *stomp's the end of Diplo's tail into the ground* D: "YOW! Gee willikers, that smarts!" P: "You had it coming, Diplostick. Now it's my turn to take a bite out of your neck." *20 minutes later* D: "YOW! I'm not food, you fat imbecile!" P: "I beg to differ." *bites Diplo's eyes out*
The Paralititan also had a rather morbid sense of humor. This particular one evolved over many more millions of years and eventually became Tim Burton. I'm not a big fan of his films, so Diplodocus it is.
A diplodocus for some random reason turns angry and looks for some trouble. It find a angry paralititan and whips its leg. It just gets more angry and reared up on its hind legs and crushes the diplodocus