1) Godzilla, 1954, without a doubt Godzilla is most influential movie monster in history. The film was produced by Toho Productions, Limited, and had a budget of ~$250,000. Depends on who you’re talking to. At some points in the Showa series (early films) he’s is said to be as tall as 400 feet, but the official measurement is 50 meters or 165 feet and WEIGHT Approximately 45,000 lbs.
2) King Kong, 1933- the greatest thing your eyes have ever beheld. He was a king and a god in the world he knew, but now he comes to civilization merely a captive – a show to gratify your curiosity. Ladies and gentlemen, look at Kong, the Eighth Wonder of the World! Despite its various deficiencies and occasionally antiquated style, King Kong remains not only a milestone of movie-making, but a magical experience. Ultimately, the mystique of the film lies not so much in what it offers today, but what it has contributed during the course of the last six decades.
3) The Kraken- Clash of the Titans, 1981- A film adaption of the myth of Perseus and his quest to battle both Medusa and the Kraken monster to save the Princess Andromeda.
4) Gamera the Invincible, 1966
5) Unknown- Cloverfield, 2008
6) The Rhedosaurus- The Beast from 20,000 Fathoms, 1953
7) Ants – Them! 1954
8) Reptilicus, 1961
9) Mothra, 1961
10) The Rancor- Star Wars: Return of the Jedi, 1983