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Capture One is head and shoulders above Lightroom.

But then so is its price, and it's a subscription model or a perpetual-and-no-updates model, which is an uncomfortable choice.

I like DxO PhotoLab a lot -- it's my preferred tool because I find its raw conversions to be much more useful if you're trying to work with cameras of multiple ages and manufacturers -- but it lacks some of the library management that a lot of people like or need (stock shooters, journalists).

Library management is not really an issue for me, and PhotoLab works well. Plus the simulations in FilmPack are, IMO, the best in the business for stills.

Darktable is decent (in my experience).

https://www.darktable.org/

Capture One.

Yeah after posting that I'm actually downloading the trial now :)

ACDSee

Have you tried Photomator from the Pixelmator folks?

Until recently it couldn't really compete for what people use Lightroom for aside from editing (because it didn't have photo management). They've added it since a few months now in version 3.x.