Go for a Stego. They’re not too difficult to tame and can gather wood and thatch as well as berries. They also provide extra defensive and offensive capabilities by means of their different plate modes, which is handy for harvesting in more dangerous areas. Your biggest problem taming them is going to be other Stegos aggro-ing when you attack one.
To the guy who said that you can’t harvest veggies, I beg to differ. On ragnarok near the dragon trench, you can find savaroot and rockarrot plants on the hills close to the beach. Easy no trouble food source.
Trike!! Easy to tame a low level, abundant, they should be way higher than 28. Their saddle is obtainable at much lower level than a bront.. my 78 collected about 90% as my bront and they are so much quicker and smaller.