The 'Chosen' series by Stacy Jones is a sweet reverse harem take. A human woman crash-lands on a planet and is found by three alien males who share a bond. It's definitely steamy, but the focus is heavily on the gentle, protective nature of the aliens and the building of a unique, polyamorous family unit. The aliens are genuinely kind and curious, not aggressive alphas.
If you prefer your alien romances with less dominant aggression and more communal caretaking, found family, and a heroine being genuinely cherished by multiple partners, this series is like a warm hug. The conflict comes from the environment and other creatures, not from relationship drama between the core group, which makes for a very low-angst, high-comfort read within the genre.