That’s pretty silly
I enjoy the Force Awakens but fully admit that it was a very safe movie in many aspects.
I think “very safe” is greatly exaggerating things (I can think of a million ways it could have been “safer,” not to mention the word could mean a number of things), but how “safe” a movie is has almost nothing to do with its quality. So it’s a silly ranking. Might as well rank based on another arbitrary metric like how long it took to write the script (in which case TPM wins with 5 years and AOTC loses because it never had a script).