Mavic 2 all the way, the automated follow modes are much improved over older Mavic and Phantoms.
The Mavic 2 gimbal is sturdier than original mavic which was literally hanging on rubber bands and vulnerable.
Phantom 4 is probably a bit more robust and crash proof at the expense of needing a suitcase to carry it about, and increased set up time - props on/off is almost obligatory. The smaller Mavic Air is good too if you aren't planning to fly out far.