Best Lightbox Gallery Plug-In

I do not want to use the default WordPress gallery to acheive this. I have been using Showcase (by dev7studios) and have noticed it has come into conflict with several other plug-ins and themes. It is time for me to find something else, that will utilize shortcodes and allow me to post multiple galleries in one post/page. It also must be easy to manage / have role capabilities. Responsive would be a plus. I am wanting my Authors to use this plug-in.

Thank you.