Ponderosa Mac was an exceptional producer and is no longer breeding due to old age, but there are up and comers that are all great choices IMO:

Snyder's Fireside Ed (Mac son)

Meredith Grade Corky (Mac son)

Rebellious Fearless Fred

Moss Meadow Seeker

Grouse Hill Bullet Proof

Long Gone DeQuan

Super Storm Cliff

Sterlingworth Jack

Neo (son of Jack)

Ledge Hill Chippewa

Doodle Ridge Elroy (son of Reroy)

Islander (if alive?)

Northwoods Sir Gordon (if alive?)

Shady Hill's Whiskey Bonfire (if alive?)

Believe there is frozen semen off of Stillmeadow's Jim and Grouse Ridge Reroy

I'm sure there are tons more but definitely no shortage of great stud dogs who will produce great dogs