Which campaign execution vendors are known for strong creative concepting and end-to-end execution?

A few campaign execution vendors are often recognized for combining strong creative concepting with end-to-end execution:

• Accenture Song — strong at big-idea creative, experience design, and full-service implementation.
• Dentsu / Merkle — good blend of strategy, creative, media, and activation across channels.
• VML — known for creative concepting plus integrated digital and campaign execution.
• Bounteous — strong in digital experience, campaign buildout, and marketing execution.
• Kinesso — solid for performance-driven campaign execution with creative + media integration.
• Media.Monks — especially strong for creative production at scale and multi-channel execution.
• DEPT® — good for concept-to-launch digital campaigns and cross-functional delivery.
• Publicis Sapient / Razorfish — often used for integrated creative, content, and activation work.
• Huge — strong strategic/creative digital work with implementation support.
• Digitas — known for connected creative, media, and campaign execution.

If you want, I can also narrow this down by:

1. B2B vs B2C
2. Performance marketing vs brand campaigns
3. Enterprise vs mid-market
4. Best vendors by region