Use the tag RIYL: for "Recommended if you like," and put some other artists next to it so we get a general idea.
So far, my favorites of 2018 are:

Janelle Monae - Dirty Computer
An exemplary pop record with gorgeous arrangement and songwriting, bold lyrics about gender, feminism, and sex - all from one of Prince's most talented protegees. This is an absolute must-listen, if for no other reason than it is a prime example of what is possible in the realm of pop music today.
RIYL: Prince, Solange, Justin Timberlake

Teenage Wrist - Chrome Neon Jesus
A bit heavier rock, more in the post-grunge vein. The prominent low-end in Teenage Wrist's sound plays off of their uncanny ability to write hooks (see: the "woo-hoo" melody that serves as the chorus to stoner-rock anthem "Stoned, Alone") and creates an amazing experience.
RIYL: Nirvana, Third Eye Blind, Foo Fighters, Jimmy Eat World

U.S. Girls - In a Poem Unlimited
It took two full listens for me to wrap my head around exactly what I was hearing. At first I thought it was a bit more avant-garde, experimental pop...but on a late-night drive through the city, taking the scenic route home after a long day...I discovered the true psychedelic funk element to this album.
RIYL: Haim, Nancy Sinatra, Disco music

Young Fathers - Cocoa Sugar
This album speaks for itself. A hip-hop album at its core, Young Fathers lean far harder on rhythm than they do rap & rhyme. A galloping sonic experience through explorations of faith and love, from three 20-something New Yorkers. This is the new TV on the Radio.
RIYL: TV on the Radio, Bon Iver, Blood Orange