This is highly contingent upon where you are based (and official tax resident) as you stated you will be the sole owner. Recommend you speak to a tax attorney for this regard.

Since you are a sole owner, an LLC might provide better liability/asset protection. One country to look at may be Nevis - which gives excellent asset protection and is 'tax-transparent'.

A LLC in a pro-business state in the USA (Wyoming, Delaware, Nevada) is another option which has a good reputation, and low cost to get up and running. However, longer term accounting and compliance can be more expensive than some other jurisdictions.

You mentioned supporting your credibility - in that regard Singapore and Hong Kong are two reputable jurisdictions with minimal red tap, with 0% effective taxation possible if no transactions take place in the jurisdiction*. This is a general overview and not legal or tax advice.