It’s Your body.
We are very limited in how well We can judge what’ll work for you.
I’ve done a fair bit of MTB credit card touring. Fairly long days, with a backpack.
Flat bar, bar ends. Bar set even, or maybe 2” below saddle. Works for me.
I’d assume riding as a Courier means frequent chances of getting off the bike for a few moments.
IME that makes position less critical than when doing long uninterrupted sessions.

If you have a 1” threaded fork, there are some quite tall quill stems available.
However, I’ve only ever seen those with wraparound clamps. And you’re very unlikely to be able to fit a modern drop bar into one of those. It’d have to be one with the traditional big radius bends.
I wouldn’t worry about the forward protrusion though.
The bike will still remain rideable.