That would be Kix. Due to his being frozen in stasis by the Separatists, he survived for 50 years after the end of the Clone Wars before being awakened by a pirate gang several years before the events of the sequel trilogy. Kix, Able, or that one Delta squad guy that appeared in legacy of the Force.
The two clones actually met their demise in the same arc. Hardcase and Waxer. In my opinion the saddest death was 99's death and every time I see it I can't help but tear up. The second saddest was 5's he died because everyone thought he was crazy about order 66 when really the Kaminoan drugged him.
Clone 99 was a clone of the bounty hunter Jango Fett, created on the planet Kamino to be a soldier of the Grand Army of the Republic. However, 99 was physically disabled due to genetic errors during the cloning process. As a result, he aged faster than his fellow clones.
The Alpha-Class ARC Troopers were the deadliest clones in the Republic army. They were trained personally by Jango Fett and lacked the mental modifications other clone troopers had received. Their free-thinking nature meant many Alpha clone troopers refused to follow Order 66.
The Oldest and Last Surviving Clones - Star Wars Explained
Who is the most loyal clone?
Captain Rex
If one thing could sum up his appeal it would be his steadfast loyalty to not only his brothers in arms, but the Jedi he served alongside during the Clone Wars and to the Republic itself.
CT-9999/9999 nicknamed "Nines" was a clone trooper in the 37th Assault Legion. He served under commander CC-5629 nicknamed "Hunter" in the battle of Texx.
He attempted to explain the conspiracy against the Jedi Order through the true purpose of the inhibitor chips placed within all clones, but his drugged state made him seem incoherent. Anakin disregarded Fives's story and decided to take Fives back to the Temple to be treated, causing Fives to become even more enraged.
Most battles in the clone wars didn't involve clones or droids, according to The Essential Guide To Warfare, and most of the battles involving clones weren't in the show. So considering there were about 3.5 million clones, it seems reasonable that 700,000-900,000 clones died given the intensity of the warfare.
Replying that he did not take prisoners, Hevy activated the tibanna explosives, sacrificing himself and destroying the listening post along with the droids inside.
Plan 99 was a plan of self-sacrifice used by Clone Force 99. The name of the plan was a reference to 99, a clone trooper who sacrificed himself to protect his fellow clones during the Battle of Kamino.
Fox, also identified by his clone designation CT-0000/1010, was a loyal clone trooper who fought as a soldier in the Grand Army of the Republic throughout the length of the Clone Wars. By 19 BBY, he was serving as a Clone Sergeant in the 501st Legion on the Republic's capital, Coruscant.
R2-D2, sometimes spelled Artoo-Detoo and often referred to as Artoo, was an R2-series astromech droid manufactured by Industrial Automaton prior to 32 BBY, who would participate in major galactic events for nearly two centuries alongside the Skywalker family.
CT-666, nicknamed "Barlex", was a clone of the Mandalorian bounty hunter Jango Fett who served as a Sergeant in the Grand Army of the Galactic Republic's 7th Sky Corps, 212th Attack battalion and 2nd Airborne Company during the Clone Wars.
CT-1111 was a clone trooper assigned to Theta Squad during the Clone Wars. He was given the nickname "Ones" due to the fact that his number was all ones. He was killed during a battle against the Separatists.
CT-7777, nicknamed "Nex", was a clone trooper who served in the Grand Army of the Republic during the Clone Wars as part of the 30th Battalion. He was a member of the elite unit known as Galek Squad. Nex participated in many early engagements of the war, including conflicts on Prakith and Poluros.
The Republic ultimately won the Battle of Christophsis and covered up Slick's betrayal. His motives were kept secret from all but the Republic High Command and those who were present for his confession.
Advanced Recon Commandos, also known as Advanced Recon Clone troopers, or simply ARC troopers, were an elite variant of clone trooper in the Grand Army of the Republic during the Clone Wars. Although much rarer than other clones on the galactic scale, they were also among the most skilled soldiers in the galaxy.
1. Alpha (Alpha-17): Because he was the absolute genius who trained hundreds of clone commanders and other clones to individualize themselves, and he knew everything there was to know about defending Kamino and leading the Alpha-class ARC troopers.
