Doctors and Daleks has six "everyman" PC classes, one for each ability score, which can be dropped into D&D pretty seamlessly. The classes all have "quips", nonmagical abilities which work mostly like spells and cantrips but represent unusual knacks and talents, anything from a well-timed...
It is a truth universally acknowledged that an ape man in possession of good fortune must be in want of a wife.
"Tarzan and Jane Austen" in various styles.
I run a mixed table - players are free to pilfer from nearly anything in the 5e ecosystem. But Tales of the Valiant is the official baseline. I picked it because it's available in PDF, there's a low cost softcover version, the core rules are two books rather than three, and I prefer their take...