Any way to prevent members of SQLAgentOperatorRole from creating jobs?

I need some people to have access to troubleshoot/start/stop SQL jobs their accounts wont own in SQL 2014.  To do this I've granted role membership to SQLAgentOperatorRole in msdb and revoked EXECUTE on sp_add_job, however anyone with membership to the operator role can still create jobs.

Is there no way to override the rights provided by SQLAgentOperatorRole?  Or is there a way to provide members of SQLAgentReaderRole the ability to start/stop jobs they don't own as well as prevent them from creating their own jobs?

Just trying to baton down the hatch for SQL security.  Any help is appreciated.  Thanks.