Not quite that, but I have a British warmblood x Connie. He’s only 4, and is currently 15.1. I expect he may make 15.2 when he’s completely finished. He’s very very quiet and sensible. At the moment, mostly just hacking!
I've seen on at a Connie Breeders show that was in the Part Bred class - I dont know the full breeding, was only talking to the girl briefly but she was it was Warmblood cross - she got pulled in first! It was a beautiful horse, I would say a neat 16h/15.3h, 2nd place was a Connie x Welsh cross which was tiny, 3rd place was me on my Draught x Connie (15.2) and 4th was a lovely TBx Connie which was leggy but still under 16h!
My mare is a KWPN x Connie. She measures at 16.1. She is the perfect allrounder, done a bit of everything. Has a fantastic temperament from her Connemara side, and the height and movement from her dam. I personally think it’s a great cross over breed. Sorry if this post is too late to help you, if you’d like photos let me know.