Luke Rockhard -
Lovato Jr was a close 2nd.
Geez I actually forgot I rolled with Daniel.
It was at an mma seminar that Big Nog was doing when he was UFC Champion at the time and Daniel was there as well.
I literally had zero mma experience and at the end of the seminar people were asked if they wanted to roll with Daniel, but you had to be a blue belt or higher.
I was overheard saying, "man, I wish I could roll with him, I'd never have this opportunity again". One of his guys heard that and made an exception and I rolled with him. It was amazing how good his hips were. I tried to get out of his guard and did this like Kazushi Sakuraba white belt cartwheel move and for less than a split second, I was out of his guard but just like that, I was back in it. The first armbar he did to me I think was 8 seconds in, and the 2nd one about 20 seconds in lol. It all happened so fast.
I think in less than a year Daniel Valverde grappled and WON against Vinny Magalhaes at a UFC expo jiu jitsu thing. This was when Vinny was arguably at the top of his game regarding jiu jitsu competing.