After all the research that I've done, Aprica & Peg-Perego are good choices for a strong and sturdy strollers.
MaClaren is also very good - the only disadvantage is it can't stand on its own when folded.
For Aprica, I recommend Aprica Stick Flat; Peg-Perego Si Classico or P3 Classico.
If you notice, these 3 brands have similar structural designs.
Any strollers that have too many folding joints are not as stable.