The building blocks of 6d (1, 0) SCFTs include certain rank one theories with gauge group G = SU(3), SO(8), F$_{4}$, E$_{6,}_{7,}_{8}$. In this paper, we propose a universal recursion formula for the elliptic genera of all such theories. This formula is solved from the elliptic blowup equations introduced in our previous paper. We explicitly compute the elliptic genera and refined BPS invariants, which recover all previous results from topological string theory, modular bootstrap, Hilbert series, 2d quiver gauge theories and 4d $ \mathcal{N} $ = 2 superconformal H$_{G}$ theories. We also observe an intriguing relation between the k-string elliptic genus and the Schur indices of rank k H$_{G}$ SCFTs, as a generalization of Del Zotto-Lockhart’s conjecture at the rank one cases. In a subsequent paper, we deal with all other non-Higgsable clusters with matters.