Hi there, is this a school project? Here goes, there are 2 styles of painting which often use dreams .
SURREALIST; Georgio de Chirico, Marcel Duchamp, Georgia O'Keefe, Max Ernst, Rene Magritte, Joan Miro, Pablo Picasso, Man Ray, Dorothea Tanning, Frida Kahlo and everybody's favourite weirdo; Salvador Dali !!!!!!!
SYMBOLIST; Pierre-Cecile Puvis de Chavannes ( phew!), Gustave Moreau,Odilon Redon, Gustav Klimt.
You could google these individually to find out more, hope this helps!!!