First, evaluate your priorities then choose plugins that you absolutely need based on highest priority.
We recommend other useful plugins like Google Analytics for monitoring your visits or AddThis to permit your guests share your posts. Both plugins will help you increase visibility and promote your blog online.
As soon as your blog is well known, prepare to combat pestering commentaries with a spam filter like Akismet. Utilise WP Security Check module to ensure it doesn't have any known issues or infections.