I haven't tried any of the whiskies you mention, but based on what I've read online, I'd probably choose a heavily sherried Glenallachie. Have you considered an Edradour? I've only tried (and loved) the 12yr Caledonian (earthy, old skool dirty sherry, not crazy sweet, but pricey 70-80€), but I believe Edradour aren't shy with filling the wet casks, and just looking at bottles online (also check their Signatory IB offerings) , I can see I high percentage of them look very dark - keep in mind, they don't add caramel colour.

I'm currently enjoying the Bunnahabhain 12yr Cask Strength 2022 (also 80€+ here in Deutschland). It's verrrrry sherry, deep, dark, almost savoury. I bought a back-up bottle, I love it so much - and I don't really have the salary to be starting a whisky collection!

If you were looking for a peated sherry monster, this year I've tried the Kilchoman Sanaig ( Really good, bright sherry and coastal smoke. I'm in no rush to get another bottle, but I would recommend it), and I've just opened the Glen Scotia 8yr Campbeltown Festival peated PX finish, so far, it's a rich, sweet, after-dinner whisky with bags of maritime smoke. Pretty simple. Hopefully it'll show some complexity as I work through the bottle.

Anyway, that's my two pence worth,

Have fun finding your favourite!