The following lists are subjective and based on my opinion :) Some of the books may fall in overlapping categories but I picked the ones that suited them best.
Emotional/Angst Reads
The Opportunist (Love Me With Lies #1) by Tarryn Fisher
Dirty Red (Love Me With Lies #2) by Tarryn Fisher
The Sweet Gum Tree by Katherine Allred
Redeeming Love by Francine Rivers
Blue-Eyed Devil by Lisa Kleypas
Most Romantic
Overseas by Beatriz Williams
Best Second Chance Stories
For You (The 'Burg Series) by Kristen Ashley
The Wreck by Marie Force
Historical Love Stories
The Bronze Horseman by Paullina Simons
Tatiana and Alexander by Paulina Simons
The Summer Garden by Paullina Simons
If you like Kristen Ashley, then maybe try...
Beautifully Damaged by L.A. Fiore
Undeniable by Madeline Sheehan (unconventional - not quite a romance, most like Creed)
Reaper's Property by Joanna Wylde