Yes ,Simiel, if there was time enough for thinking.
The Ring never came in anybody's hands (man or elf) before Sauron was defeated. So, there was no experience on that subject (influence on man).
The Ring probably spoke to Isildur, and it was rush and bad decision which was result of ignorance, primarely. Luckily, he was slain by orcs, before it made real demage to him (turning him inti nazgul or something similar).
I don't think he could have been new Dark Lord, since he couldn't have had the power to wield it. I belive that Elrond sensed that, at least, even if he couldn't prdict the exact outcome
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