What about Asgaros Forum ?

Asgaros Forum is the perfect WordPress plugin if you want to extend your website with a lightweight and feature-rich discussion board. It is easy to set up, super fast and perfectly integrated into WordPress.

From plugins repositoryDescriptionAsgaros Forum is the perfect WordPress plugin if you want to extend your website with a lightweight and feature-rich discussion board. It is easy to set up, super fast and perfectly integrated into WordPress.Support, Demo & Documentation

• Support & Demo
• Documentation

 DescriptionFrom plugins repository

Features

• Simple Content Management
• Profiles & Members List
• Notifications & Feeds
• Powerful Editor
• SEO-friendly
• Reactions
• Uploads
• Search
• Polls
• Widgets
• Statistics
• Guest Postings
• Approval, Banning & Reporting
• Moderators, Permissions & Usergroups
• Customizable Responsive Theme
• Multilingualism
• Multiple Instances
• Multisite Compatibility
• myCRED Integration

Installation

• A new forum-page is automatically created during the installation
• Add this page to your menu so your users can access your forum
• Thats all!