Hi,
You're looking for someone to manage your brand online, I had helped few artists to make their presence online and i'm pretty familiar with this task, i was actually involved in removing bad press and getting the good press up on google search results for artists. You're right about one thing, an monthly management is required as google rank brain ( what google uses now to rank pages / articles ) is tricky to handle.
I'm well versed in SEO ( which is required ) and can help you manage your online presence deliberately and elegantly. As far as your wiki goes, I've made solutions to make sure a wiki stays as it is ( usually people can change your wiki and make changes ).
Looking forward to hear from you.
Cheers!