Koloa is terrible. Went and did a tour at their shop in Hawaii when I was there. The dark was marginally better than Captain Morgan but for the price, there's way better.
I stick to Havana Club, Mount Gay, Diplomatico or Appleton 12 yr.
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Havana and Appleton are quite sweet and so is Mount Gay. Diplomatico you could pour neat and enjoy.
Cruzan isn't bad just not my top one.
Captain Morgan Private Stock is ok.
Brugal is in this category too.
Captain Morgan Lime bite run is good for rum and coke if you don't have a lime.
Sailor Jerry and Kraken are in my lower category as they're terrible neat. Just marketed well.
Captain Morgan Black spiced rum is not good. Fake coloring added to make it look aged. It isn't.
Navy and Lamb's is by far the worst. Also White Koloa is this bad too, just you'll pay more for it.
I've had my share of rum tastings and it's interesting to have someone pour samples of a bunch of decent rum and you blind test them. Top picks aren't always the one your tastes chooses.