There are a lot of people who create great content and manage open-source projects relevant to the Terraform community but I can't think of the best structure to get these links listed here without copying lists like awesome-terraform.
https://twitter.com/antonbabenko/lists/terraform-experts - List of people who work with Terraform very actively and can tell you a lot (if you ask them).
https://github.com/shuaibiyy/awesome-terraform - Curated list of resources on HashiCorp's Terraform.
http://bit.ly/terraform-youtube - "Your Weekly Dose of Terraform" YouTube channel by Anton Babenko. Live streams with reviews, interviews, Q&A, live coding, and some hacking with Terraform.
https://weekly.tf - Terraform Weekly newsletter. Various news in the Terraform world (projects, announcements, discussions) by Anton Babenko.