AWS Architecture and Azure Architecture sites provide a variety of resources for architects including reference architectures. With AWS you get a brief one page PDF diagram for each scenario. With Azure you get a more in-depth documentation style following the infographic. Here are two examples. The first is an AWS financial services grid computing architecture.
The second here is an Azure machine learning architecture.
The reference architectures and additional architectural helps provided by your cloud provider can be very valuable.
And here's the BUT.
But you should not simply copy and paste. Use these guidelines to provide you with ideas and help you to think of things that you are missing in your own cloud architecture solutions. Take the good ideas and use a skeptical eye to pick and choose what works best for your organization's use cases.
Think of it as if you're building a car. Do you look at how other cars are built? Or do you put on blinders and make the same mistakes as everyone else had to make before you came along?