Never seen one in the Ozarks specifically but I've had a few odd encounters with large black animals in forested areas here in Romania, so I follow these reports closely. The interesting thing to me is how consistent the descriptions are across completely different countries and continents - big, black, silent, often just watching before disappearing. No sound, no tracks sometimes.
Three times in a month is significant though. Either theres a genuine big cat living in that area, or something stranger is going on. I've read accounts where people describe these animals moving in a way thats just slightly off, like they dont move through the environment the way a normal animal would.
What direction was it heading each time? And roughly the same location or spread out across a wider area? Details like that matter if you want to build a proper picture of whats going on.