LinkedIn Influencers Lists Building

I'm looking for a list of LinkedIn "influencer" profiles in several niches across France, French Switzerland, and the US.

Niches:
- Content Marketing & Copywriting
- Workplace Wellbeing
- Writing & Storytelling
- Self-Love & Confidence
- SaaS
- Email Marketing
- Mental Health

Criteria for selection:
- Follower count: Minimum 20,001
- Engagement rate
- Relevance to niches

Ideal skills and experience:
- Proficiency in LinkedIn and influencer marketing
- Ability to analyze engagement rates and relevance
- Experience in lead generation strategies

Please provide a sample in your proposition and tell me your method.