Mahogany is an excellent choice for the purposes you describe. Walnut or Wenge are other options, however, they may be more difficult to find as they are not as commonly sold.
dark furniture can come in many diffrent finishes. Some of the most popular ones are of coffee colors like cappacino, Expresso, And there are many diffrent shades of oak from lighter to darker colors
Walnut is a nice durable wood for furniture, and it comes in dark brown to almost chocolate. It is a good tree to use because walnut trees thrive almost everywhere.