"among others" at the end of a sentence
Yes, the comma is fine.
The "academic" section of the Corpus of Contemporary American English includes 358 hits of the string "among others .", i.e. among others in sentence-final position. Of those, 302 instances are separated off with a comma. That shows that native American authors of formal texts accept, in fact strongly prefer, a comma in this context.
The following graphic gives the first 20 hits of the referenced corpus query:
