Cortez
Tough but Fair
I bred Trakehners on a large scale for many years. I bred for dressage and used bloodlines suitable for that, but many of my horses went on to excel in eventing which is a sport which really suits the Trakehner.
Selle Francais are one studbook that is producing good eventers currently. They tend to have more 'blood', including TB and AA, than other studbooks but they can be sharp (e.g. a lot of eventers have Diamant de Semilly lines, but can be very quirky (including the only warmblood I have had, a SF on loan for a couple of years who had a very tricky spook and spin
An old friend used to work on a breaking yard and he said "back in the day" it wasn't about the "breed" it was about "what they were good at". I really think that is what matters, look for something that will do the job for YOU. There's no point in having a smart horse that could do x or y with a good rider, most pros could get a donkey round a Novice course, just go for something that puts a smile on your face, gives you confidence and makes you happy.
Early days.....you coud be luckyI have a warmblood - given he's only 5, but I intend on eventing him eventually at a low level. He's never sick or sorry. I think it depends on the individual horse too. My horses sire & grandsire both event!