The single best early tame! You could basically get them as soon as you leave the character creation. With a little bit of luck berries will be enough to tame one up. Get some mushroms and flowers in the swamp if you want to increase your chances. Less than 5min of work and you got yourself a survivable, decently hard hitting and quick enough mount that doesnt require a sadle. As the cherry on top it can gather every plant and dino recource there is. Use it to get your narcotic production started which is going to xp boost you up to crossbow levels in no time from where you can comfortable tame whatever you like. It is the ultimate kickstarter for your playthrough.
This guy is my favorite dino to start. It can farm LOTS of fiber, chitin, berries, rare mushrooms, rare flowers, polymer, etc. And it has a considerably good melee and health. But people don't see its value just because its a big coward iguana... Lmao. But for real, they're really one of the best dinos to get at the beginning, if not the best. Give this an up to let people know.
You might see a moschops and say: Oh, look free meat and hide. WRONG. TAME THIS DINO. Moschops are the kings of harvesting. If you level up it's prime meat harvesting it could give you around 5-20 prime meat! And if you keep upgrading you'll get more! This dino will help a lot. THEY ALSO DROP LARGE EGGS SO YOU CAN MAKE REALLY NICE KIBBLE. THESE ARE ONE OF THE MOST USEFUL DINOS! YOU CAN EVEN RIDE THEM!!
Moschops is literally one of the best chitin and polymer farmers, if not the best. Kill trilobites with it and you'll see how much chitin it gets (and a bit of oil and pearls too). I spent the last hour killing trilobites with Potato (my Moschops) and got two chests full of chitin. Apparently people don't know this so give it an up to let everyone know.