I want the best onsite SEO for our site

I am looking for an experienced freelancer to provide comprehensive onsite SEO services for my existing business. I have comprehensive content and meta data already written and have implemented some SEO tools as well. I'm looking for the best results possible, so I need a freelancer who can use their expertise to optimize and fine tune all onsite SEO elements to get the most out of my website. If you have experience with creating SEO-rich blogs, articles, etc., that would be a huge plus! I want an experienced freelancer who really knows their SEO and is committed to undergoing the project with commitment and dedication. Please provide a detailed proposal outlining your experience and approach.