When it comes to high-quality proteins, several sources stand out due to their amino acid profile and digestibility. Here are some:

1. **Eggs**: Known as a complete protein, eggs contain all essential amino acids in a balanced proportion. They're highly bioavailable and versatile in cooking.

2. **Chicken**: Skinless, boneless chicken breast is a lean source of protein, low in fat, and rich in essential amino acids.

3. **Fish**: Salmon, tuna, mackerel, and other oily fish are excellent sources of protein and omega-3 fatty acids, which are beneficial for heart health.

4. **Lean Beef**: Lean cuts of beef like sirloin or tenderloin are rich in protein, iron, and vitamin B12.

5. **Greek Yogurt**: High in protein and probiotics, Greek yogurt is an excellent dairy source, often preferred due to its lower lactose content.

6. **Quinoa**: Among plant-based sources, quinoa stands out as a complete protein, rare in the plant kingdom. It contains all nine essential amino acids.

7. **Lentils**: These legumes are a great source of protein, fiber, and various nutrients, making them an excellent choice for vegetarians and vegans.

8. **Tofu and Tempeh**: These soy-based products are complete proteins and popular meat substitutes, especially in vegetarian and vegan diets.

Remember, high-quality protein sources should ideally be part of a balanced diet to ensure you're getting a variety of nutrients your body needs.