This may depend on business needs. You have to know what do you expect from company website and what it should do. For example if you need only a simple low-cost website to promote the company and its products, or if you need to use advanced functions and plugins, or if you plan to sell products online etc.
For a simple low-cost website to promote the company and its products, the Premium plan features should fit your needs. You have access to premium themes and you can also add Google Analytics to measure the website performance.
Business plan is more expensive, but it allows to use the wide range of features that you may need, like installing plugins, SFTP, advanced SEO tools etc.
eCommerce plan features are suitable for online stores.
You should check the details of each plan before you make a decision.