There was Lenna for digital image compression (https://en.wikipedia.org/wiki/Lenna).

A pelican on a bike is SFW, inclusive, yet cool.

It is not a full benchmark - rather a litmus test.

I never realized Lenna was a Playboy centerfold until years after I first encountered it, which was part of an MP in the data structures class all CS undergrads take at UIUC.

There’s also the foreman for video: https://youtube.com/watch?v=0cdM-7_xUXM