Zubatcarteira
Now you're infected by the Musical Doodle
I didn't really have in mind using the real person as a statblock of character sheet, just their actual selves in the in-fiction fantasy world, without the game mechanics or superhuman abilities that allow the average D&D characters to perform feats that wouldn't normally be possible.Would this work as an example?
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No class, no saves, no magic. Just one HD, like a commoner. Ability scores sum to 66 (60 base common with +1 to all human race). Basic armor/shield and weapon proficiencies (you could limit the weapons to individual weapons as well). Just two skills (as from a background), two tools, and human race granted languages (common plus one).
Compared to an "adventurer" PC, you have less hp, lower ability scores, fewer proficiencies (including no saves), and of course no class features.
Finally, this PC would never advance (since no class) so no improvement or changes short of allowing downtime training. Certain rewards might include training for feats and additional skill proficiency since this is permitted normally IMO.
So, does this qualify?
In terms of what this real person could do, it doesn't have to be an average person, you can make it a 7 foot tall Navy Seal, UFC champion, HEMA expert, with 5 PhDs and a 200 IQ, that person could theoretically exist, they're just limited to real human biology, physics, etc.