People who have similar places within their respective industries, similarly broad/cult appeals, similar career trajectories etc. Go as niche as you want. I'll start simple (and i'm not the first person to make this comparison):
COLDPLAY - MICHAEL MCINTYRE
Superstar stadium-fillers, undeniably very good at what they do but pilloried by the snobs for being too 'safe.' Make people very very happy and very very angry in equal measure.
- Relevant artist taggings: