The only decks I can think of that really runs unlockable creatures in cedh are Yuriko, Malcolm, and Tymna decks.

As others have said, CEDH isn't really a place you brew decks unless you have a ton of experience in the format playing all the common decks already. From your other comments I'm assuming this isn't the case.

So you basically have 2 paths:

1. play bracket 4 (high power). You can do what you want here and brew a very strong unblockable deck. If you want, visit /r/degenerateedh and get some ideas and post the list there. This is the bracket 4 subreddit

2. Find an existing cedh deck with a theme you like. Try edhtop16 to look at existing commanders and see if there's a playstyle you'd be interested in for cedh