I'm not a huge fan of the streaming services suggesting similar artists. I use the all music site https://www.allmusic.com/ which tells me more about the artist and seems to have a more accurate algorithm. As you move down the page it gets a little whacky but I've found a lot of great artists.
A better method for me is to look at the credits for an album I look and then click on the engineer or producer to see what other albums they've worked on.