I'm looking for a drama with a really rich male guy as lead, a good example would be shopping king louis, I loved the "high society vibe" and how he cared about fashion and so on.

It'd be great if he was a bit arrogant and just the typical rich guy.

Hana yori dango
Secret Garden
Romantic princess
Goong
Try here → x

Good luck!
Try Something About 1%! It was such a fun rich guy/poor girl romance! http://mydramalist.com/18774-something-about-1-percent
Goblin! He's SUPPPPPER RICH
Heart to Heart
Bride of the Century
Moon River
Yes! Mr. Fashion
Fall in Love With Me
Protect the Boss
Noble My Love
Uncontrollably Fond
Boys over Flower
My Love from the Star ( you might not notice it but he's very rich)
secret love 2013
mask
the heirs
The Master's Sun
oh my venus
shopping king louis
cheese in the trap
boys over flowers
cinderella and the four knights
cunning single lady
drinking solo
fated to love you
the heirs
goong
goblin
kill me, heal me
because it's the first time