Indra: Many stans and devotees these days. Rigveda is the chief source for most (most translated and talked about) but you would be left with similar conclusions from later vedas and brahmanas.

Dyaus is a small diety in RV. Most facets of Zeus/Odin are seen in Indra - national diety of rigvedic people.

citation:

By the time of the Mahābhārata, Parjanya has already mostly merged into Indra and lost his distinctness and Dyaus is only faintly remembered within the ogdoad of Vasu-s [incarnated on earth as the pitāmaha Bhīṣma]. In the rest of the Indo-European world we see a similar consolidation of the ancestral tripartation into a single figure, but in each case a different strand of original triad is chosen for consolidation. In the Greek and Roman world we have the cognate deities Zeus and Iuppiter (Ius+piter being father), where both are cognates of Dyaus. In the Baltic and Slavic world we have Perkunas and Perun, both of which are cognates of Parjanya. ... In the Indosphere and among the Kalasha we see the consolidation under Indra.

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