On leading growth teams past Series A, we highly recommend the following mentors:
Michael Chang - #1 Salesperson World Wide of ~200 at Autonomy (now part of HP).
Samir Ghosh - Advised 100's startups (50+ at Alchemist, including some of most successful), collectively raised $100M's (testimonials). Worked with 20+ accelerators worldwide.
Kenan Rappuchi - Creator of the Sellerant Kickstart℠ Program for B2B go-to-market launch and product/market fit validation