There aren't many artists/bands/groups where I've even listened to their whole discography, although I've been trying to change that lately. I tend to just listen to a lot of songs from a lot of different artists. That being said, there are some artists where I have listened to and enjoyed a majority of their songs.
The first was probably Avril Lavigne. I listened to her music a lot when I was a kid, and I adored the majority of her songs. I don't really listen to her much anymore though, and I'm not very familiar with her newer songs. I listened to a lot of Michelle Branch and Kelly Clarkson as well at that time. I also had a Linkin Park and 3 Doors Down era. There might be a few more from that time that I can't remember off the top of my head.
Then when I was a bit older I started to get into Kpop, and there were a few Kpop groups/artists whose discography I really enjoyed: SHINee, F(x), Exo, IU, Taeyeon, Sunmi, NCT, and Stray Kids. I still listen to these groups/artists sometimes. Again, there are probably more I could add to this list, but I can't remember.
More recently, some artists I actively listen to are Taylor Swift, Patty Griffin, Noah Kahan, and Julieta Venegas. Technically, I started listening to Taylor Swift when I was younger, and there was a time back then as well when she was one of my favorite artists, but then I didn't listen to her music much for several years. I only got back into her music last year. Her discography is amazing though. I've liked some Patty Griffin songs for awhile, but I only recently took the time to go through her whole discography, and she has a lot of great songs. Some of my favorite songs of hers are Rain, Long Ride Home, Not Alone, Poor Man's House, Sweet Lorraine, Making Pies, Let Him Fly, Be Careful, Nobody's Crying, Mother of God, Burgundy Shoes, and 10 Million Miles. I started listening to Noah Kahan last year, and I really enjoy his music. Some of my favorite songs of his are Orange Juice, All My Love, The View Between Villages, Call Your Mom, and Paul Revere. Julieta Venegas is one of the artists I found since I started learning Spanish and started searching for artists who sing in Spanish. She has a lot of songs I like, such as Limón y Sal, Lento, Me Voy, and Amores Platónicos