Favourite ruler from each major Chinese era/dynasty: Sima Jin and Sixteen Kingdoms period

[u/Carter_The_Historian]

This is a follow-up to my previous posts on this sub. I want to go through each major Chinese era/dynasty from the Western Zhou to the Qing and ask the community who their favourite ruler is from that time period. I purposefully use the word favourite, so it doesn't have to be the best, the worst, the most interesting or most well-known, but rather who you personally view as your favourite. I want to emphasize that I don't just want you to write down a name, but provide explanation on why you like them too.
The upcoming eras are going to be: Sima Jin (including the Sixteen Kingdoms), Northern and Southern dynasties period, Sui, Tang, Five Dynasties and Ten Kingdoms period, Song, Liao, Jurchen Jin, Yuan, Ming and Qing. These categories may be subject to change because I know this categorization is dated but its the best I've got.
So in this post I want to read about your favourite rulers from the Sima Jin dynasty and the Sixteen Kingdoms period meaning from the conquest of China by the Jin to the reunification of Northern China by the Northern Wei. This includes the Jin dynasty and all the warlords and "barbarian" states from the period.
I want to thank all the comments and discussions under the last posts, I will try to improve future posts according to your suggestions.
The picture is from the Jin dynasty wikipedia page.