I agree with this. It’s the artists, not necessarily the “style” itself. Basically the fundamentals of visual language are what’s hard to master, just like writing beautiful poetry requires mastery of a written/spoken language. Artists that have spent the time and put enough thought and practice into creating their own unique voice will be difficult to replicate.

Some modern artists I can think off of the top of my head:

• Piotr Jabłoński’s art for the Dishonored series
• Laurel Austin and Wei Wang’s art that created the modern Blizzard look.
• Disney Studios’ Nine Old Men.
• Craig Mullins the “grandfather” of digital painting.
• Traditional painters like Arthur Gain, Richard Schmid, Ruo Li, Mark Boedges, and on and on.