Who Were the Original Aliens in Ben 10?

All of Ben Tennyson's original alien transformations were cool, but some were much more useful than others, like Heatblast and Upgrade.
All of Ben Tennyson's original alien transformations were cool, but some were much more useful than others, like Stinkfly and Wildmutt.
Ben Tennyson finds an alien device that allows him to transform into ten beings in Ben 10.

Top 10 Most Powerful Ben 10 Aliens

Which of Ben's aliens are stronger, the original ten aliens from the original series or the Ten aliens from Alien Force minus Alien X and replace him with Rath? - Quora

Top 10 Strangest Aliens in Ben 10

Height Chart w/ Aliens - Ben 10 (Classic) & AF) : r/Ben10

Ben 10 Years Old in Omniverse by rbta123 on DeviantArt

Ben 10: Omnitrix Aliens (Original Series) / Characters - TV Tropes

If you were Ben 10,000 in 'Ken 10', what aliens would you give Kenny for his birthday? - Quora

How would you rank all the aliens shown in the classic Ben 10 series by power? - Quora

ArtStation - Ben 10 Alien Force - Redesign Aliens

Ben 10 Original Aliens Tier List (Community Rankings) - TierMaker