There have been many significant artists and artworks from the 1960s that have had a lasting impact on the art world. Some notable artists from this time period include:

Andy Warhol: Warhol was a leading figure in the pop art movement and is known for his iconic silkscreened images of celebrities and everyday objects.
Jasper Johns: Johns was a prominent figure in the American avant-garde and is known for his paintings and sculptures that incorporate familiar symbols and objects.
Joseph Kosuth: Kosuth was a pioneer of conceptual art and is known for his text-based works that explore the nature of language and meaning.
Yoko Ono: Ono was a key figure in the Fluxus movement and is known for her experimental performances, installations, and conceptual artworks.

In comparison, contemporary artists and artworks can be quite diverse, as there are many different styles and mediums being used today. Some contemporary artists who are making a significant impact on the art world today include:

Ai Weiwei: Weiwei is a Chinese artist and activist who works in a variety of mediums including sculpture, installation, and photography.
Jeff Koons: Koons is a prominent figure in the contemporary art world and is known for his large-scale, highly polished sculptures that often incorporate familiar objects or imagery.
Rachel Whiteread: Whiteread is a British artist who is known for her sculptures and installations that explore the physical and emotional qualities of space and objects.
Tania Bruguera: Bruguera is a Cuban-born artist who works in a variety of mediums including performance, installation, and social practice.