I am same size and looking for the same.
Polish, Crabbet, Russian , french arabian, stay away from show stock, Measure circumference of the cannon bones. Bigger is better. Your looking for real close to 8 inches.
50/50 crosses I would consider Morgan, Saddlebred, TB. REAL appaloosa. IE not the colored QH's
75 arabian/25 other I would consider... Id add paint or QH to the mix and really anything other than draft.
You don't mention where you live, Farther north and the colder your rides the more heavier breeds can be ok.
Also terrain can be a factor. Shorter horses do better in the mountains and rough country, long tall in the flatlands. COurse that's just the phsical aspects. Endurance is also a mental game. SOme horses have heart some don't, some will eat and drink on the trail, some wont. Some are calm cool and collected, some will freak out at vet checks. That's the sucky part trying to figure that stuff out. Best most super duper race bred Huge cannon boned straigh backed Arabian aint worth a flip in endurance if it freaks out when the vet looks at em.