@Rafael Paez If you're reaching out locally, I would say service businesses all day!! Plumbers, electricians, roofers, landscapers, etc. Service businesses are not always the easiest to catch up with but they definitely benefit from search and ranking! I'd search businesses that need the help. Since you also do web design, find businesses that need help with both and Package Up! I'm away from my lists now but I can send you a free trial of an awesome tool we use for research tomorrow sometime.

@Rafael Paez https://localo.com/?ref=gobig (Localo for monitoring ranking, optimization, and tracking backlinks), Also Bright Local is great for helping establish one-off citations and more.