Any suggestions for a vendor marketplace?

I'm interested in creating a vendor marketplace for www.BuriedInWork.com. (We're using the Avada theme.) I tried installing WC Vendors to poke around, but the site crashed.

Any recommendations for a solution/plugin are greatly appreciated!

A few of the requirements I'm looking for:

• Will integrate with existing website (www.buriedinwork.com)
• Self-registration/management for vendors
• Vendor dashboards
• Flexible commission structure (percentage, flat fee, category specific, etc…)
• Search by category, product name, tags, and by store

What else should I consider? Thanks for the help.