Create a ranger first. That way, after you dual, you'll keep learning more and higher level cleric spells. If you intend to take the ranger to BG2, the beast master is a good choice, seeing as the disadvantage (can't use metal weapons) was already there (a cleric can't use a bladed or piercing weapon), meaning that you get to summon animals for free
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The last arrow of Legolas kindled in the air as it flew,
and plunged burning into the heart of a great wolf-chieftain.
All the others fled. -J.R.R. Tolkien, The Lord of the Rings