Bigger than what you were looking for, but my favorite stallion: Out of Bounds Farm LLC and West with the Wind, Inc.
Formula One: Tamarack Hill Farm
Aberjack: Tamarack Hill Farm
ArdCeltic Art (always a favorite of mine): Connemara Stallion *ArdCeltic Art
My favorite TB stallion, A Fine Romance: Tamarack Lane Farm - A Fine Romance Thoroughbred Stallion in Ontario, Canada
Thank you for including A Fine Romance in your list eventerdrew and for calling him your favourite TB stallion! :)
I like all the stallions you have mentioned very much.
To the best of my knowledge Aberjack now has a new owner (not sure where he is now).
I love Cicera's Icewater (I bred AFR's full sister to him in the past) and also really like another stallion formerly owned by the same people
OP - he is a bit bigger than you want, but he is a lovely horse and crosses very well with TBs, and is available for a very reasonable price.
I also LOVE ArdCelticArt - he is really remarkable, and is the first one who came to my mind for the OP's mare.
Thankyou for giving your mare a safe place to land. It looks like she has had a hard time of it, but she is in good hands now.
Best of luck to you and her.