hopIQ found 10 beers with the same roasted and chocolate character as Coopers Dark Ale. The lighter of the two dark Coopers beers, all malt and conditioned in the bottle or keg. Roasted and chocolate malts give it a deep amber to brown colour and an aroma of cocoa and roasted grain, with a creamy start on the palate and a lingering coffee note at the end. The body is fuller than the strength suggests, and a modest hop bitterness keeps the malt sweetness in check for a balanced, dry finish. Ranked by flavour match rather than popularity.
Closest match: Philter Old Ale — 74%. No twin in the catalogue yet.
4 countriesmatched across 56 flavour tagsbest match 74%

No beer in the catalogue yet — these come closest.
Close on what matters, with one thing they do differently.
Same idea, less detail — open a beer to see the full comparison.