I bought one of these back in 2014... Twisty Key Ring
Has never come apart in my pocket, is easy to add and take away keys and the keys don't bunch up too much in my pocket. Combining it with some type of carabiner for an external carry might be a good solution as well.
I also EDC a backpack with a great deal more tools that I'll post a bag dump for at some point. This is just what is in my actual pockets on an average day.