史泰龙 is the standard rendering of Stallone's surname in both Hong Kong/Taiwan and the mainland. The full name is 席尔维斯特·史泰龙. He shares 'Sly' icon status with 阿诺·施瓦辛格 (Schwarzenegger) as one of the two Chinese-language icons of 1980s American action cinema; the Rocky films are 《洛奇》, the Rambo films 《第一滴血》 ('First Blood'), and the Expendables franchise 《敢死队》.
usage
Phonetic with deliberate flair: 史 ('history', a common surname character), 泰 ('grand, peaceful'), 龙 ('dragon'). The choice of 龙 - instead of a more neutral phonetic - turns 'Stallone' into 'Shi-Tai-Dragon', flattering for an action hero.