Hi Karthik,
You are right. SAP_UI component is enough for the UI support.
As I mentioned in my answer: SAP_UI is the successor of the UI2* and UISAPUI5 software components.
This means SAP_UI replaces all the components that starts with UI2* letters, and the UI_INFRA and UISAPUI5.
If you think the question was answered, please mark this Discussion with a Correct Answer (closes, but does not lock the Discussion). This way you can help another people that may have the same issue.
Best Regards,
Emanuel