Well the Z97 boards are no longer in production, so finding them is going to be much harder (available new anyway). So a complete list would be useless. Also I've never seen a complete list of all of them that were available when they were the newest chipset (Haswell-Devil's Canyon).
I have an ASUS Z97-AR for my i5 4690K build and have thoroughly enjoyed the overclocking options (you can even save custom overclock and stock settings in the BIOS for booting for uses - I run mine at stock speed for general use like surfing and movies). Here's all that's left for Z97s on NewEgg:
https://www.newegg.com/Product/ProductList.aspx?Submit=ENE&IsNodeId=1&N=100007627%20600438202%20600491547
Why are you wanting to build a three year old chipset? You'd be much better off going with a newer Skylake for the same (if not less) money. Older components can actually go up in price over time as they are phased out of production.