What are the best options for obtaining a reliable 6-month visa in Thailand, especially in the Sukhumvit area?

Morning all. Recommendation to start with please.

I need a visa for 6 months ideally. I’ve done the visa run for too long now and I also did a 9 month edu visa. But immigration are starting to ask too many questions for my liking.

I’m open to different options; tourist, edu, etc. Just must be reliable and able to get paperwork done within next 2 weeks.

Any recommendations on agencies/schools/etc. (Sukhumvit area)

Many thanks in advance.