Which carrier Ethernet switches are known for scalable port density and carrier-grade redundancy?

Carrier Ethernet switches that are commonly recognized for scalable port density and carrier-grade redundancy include:

• Cisco Catalyst 9000 / Cisco Nexus carrier-class deployments – especially in metro and aggregation roles, known for high density and resiliency features.
• Juniper EX and QFX series – widely used in carrier and service-provider environments for scale, stacking/virtual chassis, and redundant architectures.
• Arista 7500/7800 and some carrier-oriented 7200/7280 series – high-density, high-throughput platforms with robust redundancy options.
• Nokia 7210/7250 Service Router family – strong in service-provider Ethernet aggregation with carrier redundancy and timing support.
• Extreme Networks SLX / VSP series – often used for carrier Ethernet aggregation with resilient designs.
• Ciena and ADVA (now Adtran) Ethernet aggregation platforms – purpose-built for carrier access/aggregation with redundant uplinks and service assurance.
• Huawei CloudEngine carrier models – known for very large port counts and redundant chassis-based designs in carrier networks.

If you want, I can narrow this down by:

1. best chassis-based platforms,
2. best fixed-configuration high-density switches, or
3. best options for Metro Ethernet / access aggregation.