If you don't want to deviate too much from the style, choose types that are in tune with the rest.
Betting on colors is an alternative, choose the color that matches the environment.
Bet on a stylish design, if you're a fan of design, it's a good option to bet on cool design.
Bet on straight lines, for a more minimalist decor, but still with style.
Choosing different chairs, but with the same color, will make it more harmonic.
Choosing a different material for the table and another for the chairs brings a lot of personality.
Making a mix with chairs of different designs and materials will give that "up" in the decor. And it will make the environment more modern.