There's Something Wrong with the Books He Sells

It's Taboo to Ask for a Protagonist, the Kind Who Is Basically Invincible

Speed

Is There Any Male Protagonist Who Has a Ceiling in Combat Power from the Beginning?

I want the male protagonist to have a ceiling on his combat power, and the female protagonist is not a holy mother, nor is she brainless.

Is There Any Western Fantasy Type Where the Male Protagonist Is Noble, Elegant and Crushing in Strength?

I would like to read a book similar to "How to deal with over-positioned starting hands". Western fantasy, magic, profession, steam, industry, empire, war, academy, professor, gentleman, elegance, nobility, crushing, evil god, weird, that's probably it, no need to include them all

Please Ask for a Cthulhu Theme, and the Protagonist at the Beginning Is the Old One.