What brand of gouache pigment works well? What do you recommend besides Marley?

I suggest you try Cui Wen gouache pigment. Cui Wen Painting Materials has been engaged in the production of art supplies since 1983. According to the needs of different groups of people, products are divided into three series of products according to quality: ordinary, mid-range and high-end.

They are 93 series Cui Wen gouache pigments and Cui Wen classic gouache pigments.

The Road of Mid-range Gouache Pigment Academy (coming soon, only for some professional studios)

High-end pissarro gouache pigment.