The One Ring:
* Gollum/Smeagol: Found the Ring in the Gladden Fields and carried it for centuries, becoming obsessed with it.
* Bilbo Baggins: Found the Ring in Gollum's cave and unknowingly kept it for 60 years.
* Frodo Baggins: Inherited the Ring from Bilbo and ultimately carried it to Mount Doom to destroy it.
The Three Rings:
* Gil-galad, Elrond, and Galadriel: These three elves were given the Three Rings by Celebrimbor, the maker of the Rings, and they used them for good. They were preserved and held by the elves until the end of the Third Age.
The Seven Rings:
* The Dwarves: The Seven Rings were given to the Dwarves, who used them primarily to enhance their wealth and craft. They fell under the influence of Sauron and eventually led to their downfall.
The Nine Rings:
* The Nazgûl: These nine men were given the Nine Rings by Sauron and became his most powerful servants. They eventually transformed into the terrifying wraiths known as the Nazgûl.
Other:
* Celebrimbor: The elf who crafted the Rings, but he was deceived by Sauron, who ultimately infused the One Ring with his own power.
* Sauron: The Dark Lord who created the One Ring to control all other Rings and dominate Middle-earth.
Let me know if you'd like to know more about any specific Ring or its holder!