Last great album from each of these artists IMO:
Lynyrd Skynyrd-Vicious Cycle 2003
Foreigner- Unusual Heat 1991
Ted Nugent-Spirit Of The Wild 1995
Savatage-The Wake Of Magellan 1998
AC/DC-Ballbreaker 1996
Iron Maiden-Seventh Son Of A Seventh Son 1988
Helloween-The Time Of The Oath 1996
Accept-Objection Overruled 1993
Charlie Daniels Band-Full Moon 1980
Journey-Escape 1981
Heart-Brigade 1990
Kansas-Power 1986
Gamma Ray-Somewhere Out In Space 1997
Metallica-Metallica 1991
Styx-Paradise Theater 1981
Hank Williams Jr-Wild Streak 1988
Blackfoot-Medicine Man 1990
Off the top of my head. Now, this is not to say these were the last GOOD albums by these bands, but I feel these were their last GREAT ones. And, it's by my own tastes as some of these weren't particularly popular, or maybe fans didn't like the direction of some of these, but, with an honest listen and knowing what the artist was trying to do, I feel all of these qualify as the said artists' last GREAT albums.