Word for "wide variety of"

Solution 1:

Diverse conveys a meaning close to what you are looking for:

composed of distinct or unlike elements or qualities: a diverse population

(M-W)

Solution 2:

Various is a valid possibility. The online Cambridge dictionary defines "various" as

many different

with examples:

We had various problems on our journey, including a flat tyre. The author gave various reasons for having written the book. Girardo was out of action with various injuries for most of last season. Various people whom we weren't expecting turned up at the meeting.

The same dictionary gives the alternative US definition

several and different

With examples:

He underwent various treatments for the disease, none of them successful. We enjoy eating in various types of restaurants. After holding various jobs in different states, he settled in Oregon and opened a law office in Portland.

Using 'various' in your sentence would give

The product is used by various people, such as jugglers, priests, and businessmen

Given the above definitions this carries the idea of the people being different from each other.