Answer the question at the end by quoting:

Queens of the Stone Age are an American rock band formed in 1996 in Palm Desert, California. The band's line-up includes founder Josh Homme (lead vocals, guitar, piano), alongside band members Troy Van Leeuwen (guitar, lap steel, keyboard, percussion, backing vocals), Michael Shuman (bass guitar, keyboard, backing vocals), Dean Fertita (keyboards, guitar, percussion, backing vocals), and Jon Theodore (drums, percussion). Formed after the dissolution of Homme's previous band, Kyuss, Queens of the Stone Age developed a style of riff-oriented, heavy rock music. Their sound has since evolved to incorporate a variety of different styles and influences, including working with ZZ Top member Billy Gibbons, Nirvana drummer and Foo Fighters frontman Dave Grohl, and Screaming Trees frontman Mark Lanegan who has been a steady contributor to the band.
Foo Fighters frontman and former Nirvana drummer, Dave Grohl, joined in late 2001 to record drums for their third album. Songs for the Deaf was released in August 2002, again featuring Lanegan, along with former A Perfect Circle guitarist Troy Van Leeuwen to the touring line-up following the album's release. Also featured on Songs for the Deaf for the final track "Mosquito Song" were former A Perfect Circle bassist Paz Lenchantin on viola and piano, and Dean Ween on guitar. This record was supposed to sound bizarre--like lightning in a bottle. We also were extremely fucked up. It even sounds that way to me, like a crazy person. The radio interludes are supposed to be like the drive from L.A. to Joshua Tree, a drive that makes you feel like you're letting go--more David Lynch with every mile. Songs for the Deaf was a critical hit and was certified gold in 2003, with sales of over 900,000. The singles "No One Knows" and "Go with the Flow" became hits on radio and MTV, with the former just outside the Billboard Top 40. "No One Knows" and "Go with the Flow" were also featured on the first iterations of the popular video games Guitar Hero and Rock Band (respectively). The Songs for the Deaf tour culminated in a string of headline dates in Australia in January 2004. Grohl returned to his other projects and was replaced on the European leg of the tour by former Danzig drummer Joey Castillo, who joined the band full-time. After the tour, Homme fired Oliveri, as he was convinced that Oliveri had been physically abusive to his girlfriend: "A couple years ago, I spoke to Nick about a rumor I heard. I said, 'If I ever find out that this is true, I can't know you, man.'" Homme considered breaking up the band after firing Oliveri, but found a new determination to continue. Oliveri countered in the press that the band had been "poisoned by hunger for power" and that without him, they were "Queens Lite." He later softened his opinion and said: "My relationship with Josh is good. The new Queens record kicks ass." The two reportedly are still friends and as of October 2006, Oliveri was interested in rejoining the band. Oliveri later contributed to a Queens of the Stone Age for the first time in nine years, contributing backing vocals to the band's sixth album, ...Like Clockwork.

What mainstream exposure did they have?

The singles "No One Knows" and "Go with the Flow" became hits on radio and MTV, with the former just outside the Billboard Top 40.

Answer the question at the end by quoting:

Slayer is an American thrash metal band from Huntington Park, California. The band was formed in 1981 by vocalist/bassist Tom Araya and guitarists Kerry King and Jeff Hanneman. Slayer's fast and aggressive musical style made them one of the founding "big four" bands of thrash metal, alongside Metallica, Megadeth and Anthrax. Slayer's current lineup comprises King, Araya, drummer Paul Bostaph and guitarist Gary Holt.
In late 1987, Slayer returned to the studio to record their fourth studio album. To contrast the speed of Reign in Blood, the band consciously decided to slow down the tempos, and incorporate more melodic singing. According to Hanneman, "We knew we couldn't top Reign in Blood, so we had to slow down. We knew whatever we did was gonna be compared to that album, and I remember we actually discussed slowing down. It was weird--we've never done that on an album, before or since." Released in July 1988, South of Heaven received mixed responses from both fans and critics, although it was Slayer's most commercially successful release at the time, debuting at number 57 on the Billboard 200, and their second album to receive gold certification in the United States. Press response to the album was mixed, with AllMusic citing the album as "disturbing and powerful," and Kim Nelly of Rolling Stone calling it "genuinely offensive satanic drivel." King said "that album was my most lackluster performance," although Araya called it a "late bloomer" which eventually grew on people. Slayer returned to the studio in spring 1990 with co-producer Andy Wallace to record its fifth studio album. Following the backlash created by South of Heaven, Slayer returned to the "pounding speed of Reign in Blood, while retaining their newfound melodic sense." Seasons in the Abyss, released on October 25, 1990, was the first Slayer album to be released under Rubin's new Def American label, as he had parted ways with Def Jam owner Russell Simmons over creative differences. The album debuted at number 44 on the Billboard 200, and was certified gold in 1992. The album spawned Slayer's first music video for the album's title track, which was filmed in front of the Giza pyramids in Egypt. Slayer returned as a live act in September 1990 to co-headline the European Clash of the Titans tour with Megadeth, Suicidal Tendencies, and Testament. During the sold out European leg of this tour tickets fetched up to 1,000 Deutschmark ($680 USD) on the black market. With the popularity of American thrash at its peak, the tour was extended to the US beginning in May 1991, with Megadeth, Anthrax and opening act Alice in Chains. The band released a double live album, Decade of Aggression in 1991, to celebrate ten years since their formation. The compilation debuted at number 55 on the Billboard 200. In May 1992, Lombardo quit the band due to conflicts with other members, as well as his desire to be off tour for the birth of his first child. Lombardo formed his own band Grip Inc, with Voodoocult guitarist Waldemar Sorychta, and Slayer recruited former Forbidden drummer Paul Bostaph to take his place. Slayer made its debut appearance with Bostaph at the 1992 Monsters of Rock festival at Castle Donington. Bostaph's first studio effort was a medley of three Exploited songs, "War," "UK '82," and "Disorder," with rapper Ice-T, for the Judgment Night movie soundtrack in 1993.

What was Slayer's greatest accomplishment from 1988-1993?
South of Heaven received mixed responses from both fans and critics, although it was Slayer's most commercially successful release at the time,