Example setup playbooks for RHEL / CentOS for leaning

Does anyone have a good example set of playbooks that I can use for leaning purposes that does the basis setup of a couple of servers.

I am looking for something basic that does:

sudo to root
SSH key copy

Install a few packages

Plus any other useful examples.
I have found a few useful examples on GitHub but they are for Ubuntu (example below).

This is one:

Git: https://github.com/tomoconnor/parallax.git )
Documentation: http://tomoconnor.eu/blogish/getting-started-ansible/#.VMrD0y4oL3R

However I am getting a bit lost changing the Ubuntu references to RHEL and I don’t think that it is helping the leaning Ansible part.

I am looking for the sort of setup that is commonly used prior to more specific configuration.

Many thanks

Here’s an example of how we do things at my organization:

https://gist.github.com/BradGunnerSGT/ba1cea6c6629a702f9eb

Thank you

Fedora Project playbooks:
https://infrastructure.fedoraproject.org/cgit/ansible.git/tree/

If you want to go crazy:
https://github.com/search?q=ansible+centos+extension%3Ayml

Giovanni