Using dynamic inventory to find something without a certain tag

gistfile1.txt

- hosts: tag_clusterType_*
  connection: local
  gather_facts: false

  tasks:
    - name: Get everything in a cluster
      debug: msg="Host {{ hostvars[inventory_hostname]['ec2_tag_Name'] }} is in cluster {{ hostvars[inventory_hostname]['ec2_tag_clusterType'] }}"

- hosts: all:!tag_clusterType_*
  connection: local
  gather_facts: false

  tasks:
    - name: Everything else
      debug: var=hostvars[inventory_hostname]['ec2_tag_Name']

Filtering for the negative case is a bit weird, cause just !tag_clusterType_* as a pattern is a syntax error. So we need to explicitly say all, and then filter down to anything that doesn't have a matching tag.