Your best quality bass is going to come from ID brands. If you want looks, you can find that too, but not knowing your aesthetic and room volume kind of freezes the conversation.
I am very fond of my Outlaw X-13s. great subs... for what they are they look good. They are rated for handling a room volume in excess of 5000'3.
SVS PB 4000 is available in Piano Black, and many like that look. These will also handle large room volumes, especially in pairs.
The Hsu options in Rosewood... VTF15Hmk2 would be my main choice, but if you are in a small enough room, their sealed ULS15mk2 can be a beast... especially if you get 3 or 4 in a small to medium size room.
Rythmik offers Piano Black options, and I would look at their FV15HP-SE.
If you want, as I mentioned above, a furniture grade finish, Look at Salk Sound and what his speakers look like. He will build anything you want in terms of cabinet and finish... he usually quotes about 4 months for a build. His cabinet work is top notch!
If floor space is a concern, look at SVS PC 4000... no finish options, but maybe you end up falling in love.
Beyond that, JTR, Seaton, and Funk also build to order, I think... especially if you want a special finish... but they can get pricey.
Seeing your last post now... you will want to look for something capable in a large room. Doesn't mean you need to use it at full volume all the time... but if you buy too small, you might never be satisfied.
Just my thoughts... YMMV.
To learn more about the room volume thing, this is a good read. most of the subs reviewed hear give a rating based on the Bassaholic protocol.
https://www.audioholics.com/loudspeaker-design/subwoofer-room-size
Cheers