I know you were asking pat_t, but I couldn't resist adding a few recs of my own. Below are some of the first authors I 'met' when I dove into the HL fandom. All of their fic is good. They each also have some great fic recs to offer on their recs page:

Killa

MacGeorge

Chelle

Diana Williams (Especially her mpreg, Misconceptions, if that interests you. One of the best mpregs I've ever read.)

Taterville where you can find pat_t and others, like Chris and elistaire, who are also excellent.

Rachel

Some fic recs:

Descent into Madness by Sharon Cross and Tessa Rae

Specter by Sharon Cross

Hope these are helpful and that you enjoy them!