All of the following are basic concepts of democracy except, Worth of the individual, Equality, Taxation without representation, Majority rule with minority rights

The principle here that is not democratic is taxation without representation.

Representation is at the heart of democracy. In a democracy people need to have a way of determining their life, and this often happens indirectly, via representatives, such as members of the House of Representatives.

So a lack of representation is not a democratic principle.