There are plenty of artists who make up the rich tapestry of the rap game, from the legends who aren't with us anymore - like The Notorious BIG and Tupac - and the current crop of rappers rising through the ranks, such as Chance the Rapper and Kendrick Lamar.
But in between are the ones who've been around for decades - the ones who've made the biggest imprint and biggest impact on the industry. This group includes plenty of worthy contenders, such as Jay-Z, Kanye, Nas, Snoop Dogg, 50 Cent, Drake and many more.
However, Eminem has been crowned the King of Kings.
According to Ranker, the best of the best is none other than Marshall Mathers, which says: "Numerous different skills and attributes all must come together to make a truly legendary MC. Obviously, a rapper must display a sense of rhythm and an ability to complement the beat in unpredictable and exciting ways.
"A gift for lyricism and vocabulary is similarly essential - you can have the flow of the century, but if the words don't come together to tell a compelling story or present a unique point of view, it's still not going to translate into a great hip-hop song.
"But of course, there's also an intangible element that elevates some rappers into the ranks of the greatest of all time."
There's no denying that Eminem is brilliant at all those aspects.
His second major record The Marshall Mathers LP is reportedly the fastest-selling solo album in US history and is ranked as one of the best hip-hop albums of all time. Relapse and Recovery sold more than two and a half times more than efforts by Lil Wayne, his closest competitor for album sales. Eminem has also racked up billions upon billions of views on YouTube for his various tracks.
This video of him rhyming words with orange (a word that most people would say is unrhymable) is often cited as an example of Mather's skills as a lyricist.
Credit: CNN/60 Minutes
That 'intangible' element that Ranker was talking about is evident in the topics he's tackled over his incredible career. He's been cited as a source of inspiration by a huge swath of artists, including The Weeknd, Lil Wayne, Nicki Minaj, T.I., Usher, Kendrick Lamar, Lana Del Rey, Tyler, The Creator, The Game, and many, many more.
He most recently delivered a crushing freestyle rap about US President Donald Trump at the BET Awards.
Slim Shady appeared in a multi-story car park surrounded by his entourage before he slowly moved towards the camera, declaring this was the 'calm before the storm'.
Credit: BET Awards
The rapper covered the Obama and Trump administrations, the 'take a knee' protests, tensions between the US and North Korea, the plan to build a wall along the border with Mexico and the treatment of different races.
If you've been gagging for new material from the greatest rapper of all time, more music from Eminem can be expected soon. Although the exact release date of Shady's album isn't known, Hits Daily Double claim that their sources have found out that Universal Music Group (UMG) is in preparation of a financially huge end of the year, as three of their big acts are due to release records.
"Our spies tell us to expect albums this fall from Eminem (Shady/Aftermath/Interscope), Taylor Swift (Big Machine), and Sam Smith (Capitol), three of Uni's biggest stars," they wrote.
It is believed the album - his eighth major label solo studio LP - will be released in November.
The 44-year-old rapper hasn't dropped an album since 2013's The Marshall Mathers LP 2, although he has recently been making major live appearances, including headlining Reading and Leeds Festivals.
Featured Image Credit: PA