Netflix gathered 112 nods for shows that ranged from supernatural drama "Stranger Things" and British royal show "The Crown" to female wrestling comedy "GLOW", new Western drama "Godless" and reality makeover series "Queer Eye".
Other streaming services also received nominations for their originals, including Hulu with 27 nominations, with The Handmaid's Tale defending its Best Drama award this year.
The "This is Us" star, who plays mom Rebecca Pearson on the hit NBC tearjerker, wasn't among the names included in the "Outstanding Actress in a Drama Series" category.
Several major stars not normally associated with television got their first Emmy nominations in 2018. "This is the most diverse class of performer nominees we've had - we're nearly up to a third, which is fantastic", Maury McIntyre, TV academy president. Only one nominations category is all-white, and in three categories minority actors account for more than half the nominees. She added a postscript: "I think my mother at this moment may actually be satisfied".
The Handmaid's Tale came away with 20 nominations all up.
Some of TV's best work is now being done in the realm of limited series, and that was true again this season, with "Patrick Melrose", "Godless" and "The Assassination of Gianni Versace: American Crime Story" all making strong bids for attention.
If Legend wins, he'll join the rarified club of "EGOT" performers who've won an Emmy, Grammy, Oscar and Tony.
Game of Thrones led all shows with 22 nominations, but that number is actually a drop from the last two times the HBO show was eligible.
The comedy crown usually stored in the "Veep" trophy cabinet went this year to "Atlanta", the FX comedy created by and starring Donald Glover, which amassed 16 nods.