Keelboats with a short or high boom

[Captain Birdseye]

Hi all

I'm new to sailing, getting on a bit and consequently not as agile as I once was. I'm looking for recommendations for a keelboat for cruising between 21 and 26 feet in length with either a boom that doesn't encroach the cockpit or one which I can stand upright in the cockpit (I'm 6 feet tall) without my head hitting it when tacking.

Would welcome all suggestions, thanks.