Modular coat racks from brands like Hay or Muuto are well-designed and hold weight without any problem if you install them correctly, but here's the important bit: the problem is never the coat rack itself, but how you anchor it to the wall. If you put the wall plugs in places where there's solid brick or concrete, a designer coat rack will hold without batting an eye. Now, if your entryway has thin drywall or something weird, even the best coat rack in the world will fall down the same. So first things first, take a good look at what's behind that wall.
That said, the branded ones have better-engineered profiles and higher-quality wood, but they're bloody expensive for an entryway. A decent coat rack from Carrefour or a similar store does exactly the same thing if you install it properly: it hangs coats without sagging. The difference is that the expensive ones last more years without getting scratched, but if all you need is pure functionality, don't drop that kind of cash. What I would do is avoid those tiny cheap drywall coat racks that come with plastic plugs to mess around with: those are the ones that fall down.
My advice: pick something you like the look of at a mid-range price, buy good wall plugs (if the wall needs them, expansion ones), and don't skimp on installation. Drill straight, get the plugs in properly fitted, and let it sit for a day before loading weight on it. That way it'll hold up for years without any issues.