There are manufacturers that only make seating and then there is everyone else, and most of them make seating, too! There are thousands of different chair models; some very similar to each other yet some are very distinctive. Below are a few favorites representing task chairs, ergonomic chairs, extremely ergonomic chairs, executive chairs and guest seating.
You can choose one to see more of its features and its brethren, or just click on the manufacturer's icons to do some serious shopping. Choose a chair, define the features you want, and then sit in it to evaluate it. Remember, you spend more time in your office chair than you do on your home sofa or in bed.