Well, a medium Dominican probably equates with a mild havana, so you'll want to stay away from my favorites
Here are some MILD havanas:
Quai d'Orsay Coronas
Vegueros Especiales No. 1
Rafael Gonzales Coronas Extra
and yes Partagas. Partagas used to be a strong cigars but they switched to a milder blend around 1995 BUT as of the end of 2001, they are becoming stronger again but not like they were prior to 1995. However the following is considered to be "mild":
Partagas Serie D. No. 4
but slightly stronger than the first three that I mentioned.
Also these smaller Punch are considered to be on the slightly mild to medium side so:
Punch Punch
Punch Coronas
Now, I am not a Cohiba fan for two reasons, I think they are overpriced and two you darn well better be sure your source is good because they have to be the most counterfeited cigar in the world but if you insist on Cohibas, I'd go with the:
Cohiba Siglo VI
And yes, EVERYBODY loves the Montes and the Ramon Allones Specially Selected:
Montecristo #2
RASS
but these are MEDIUM bodied cigars by Havana standards, you may find these a little on the strong side.
For me, give me a STRONG Double Coronoa ANYDAY:
H. Upmann Sir Winston
Ramon Allones Gigantes
Vegas Robaina Don Alejandro
Punch Double Coronas
Bolivar Corona Gigantes
but you didn't ask what I LIKE, I gave you suggestions as to what you'd like and IMHO I think they're great suggestions