Mr. Dentist

Mr. Dentist is the leader of the Lords of Evil. He was the King of Detonia until he was overthrown, now striving to collect the Eternal Bricks to regain his throne. He's also a giant anthropomorphic celery, which is kinda notable.

The Conedian
The Conedian was personally trained by Mr. Dentist to be a Lord of Evil.

Sogel Rome
Sogel Rome, a floating ghost hat, is one of Mr. Dentist's Lords of Evil.

Cowboy Guru
Cowboy Guru is one of Mr. Dentist's Lords of Evil.

Frost Lurker
unknown

Trivia

 * It is considered headcanon Mr. Dentist is a shape-shifter, but can only shape-shift into healthy foods.