Could be fruit of the poisonous tree....As a 3rd party person and nothing but a 3rd party person here's who I'd suggest....Nobody offhand. Each provider will be equally good, equally not so good, deliver their own version of vanilla ice cream, and try to sell more of their product.
After delivering more than 200 accredited (RAB, RABQSA, Exemplar Global & IRCA) Lead Auditor courses in multiple disciples, I realized the vast majority of people taking them were wasting their money and time, the Lead course was not relevant to what they were going to do.
But hey, that's just me.