It’s so inspiring that you are writing a fantasy story in Chinese! Could you tell us what it is about?
The names that you came up with all sound natural, and that’s really impressive! Although I do have a few suggestions about them.
I understand that all the names are all intended to be for male characters, but to me, 雪莲, 芳静, and 力秀英 sound more like female names. This is because characters with the grass radical (艹) are usually used in feminine names. Perhaps you could save them for the women names in the story. Also, although 雪 and 芳 could be last names, they are not that common. I suggest that you add the last names to them. If you are not sure which last names sound natural, you can refer to 百家姓 (the most common 100 Chinese last names): http://114.xixik.com/baijiaxing/
As for 刘巨龙 Liu Ju-Long or 刘龙 Liu Long, I personally prefer the latter one because 巨龙 literally means a huge dragon and it is a little bit strange.
To me, the names sound like something you hear in a Wuxia fantasy novel. Keep in mind that names can represent a lot about a person and it is the first impression on the character of the readers, so this is where you can choose the words that carry certain levels of symbolism. If you could share more details about the story and the characters, I might be able to offer more specific advice!
Hope this helps for now:)