A Girl in White Stockings from the Start, and the Next Goddess, Please Queue Up

Wealthy Protagonist Novel Recommendations Only, Please No Other Genres. Begging for Good Ones

Looking for Rich-Protagonist Stories: No Dumbed-Down Characters, Lavish Spending, No Keeping a Low Profile, and Ideally Real-Life Figures

I want a story where the protagonist gets rich from the start, with little showing off or face-slapping. Keep it somewhat realistic, with all kinds of extravagant spending, and have them gradually enter elite circles. It’d be great if real people appeared in the story, too, to make it easier to immerse myself.

Any Wealthy-Protagonist Stories That Don't Go Overboard from the Start or Make You Cringe?

Please recommend a tycoon novel that's not annoying and has no harem. Please, no more stories with multiple female leads. I just can't get into those at all.