Hmm seems only fitting we should add American shows too. Lots and lots of great ones over the years. Suspect it would be easy to go over a 100 with these but hey, why not give it a shot here and see what gets picked. I'll start it with an old favourite:
1)
Star Trek (1966-1969): This classic Trek show is still IMO the best of them all. Featuring a great lead trio of Captain Kirk, Mr. Spock and Dr. McCoy and rest of the crew on their space adventuring journey throughout the universe. Numerous themes (racial relations, war, non-interference with other cultures, religion, war, death, government corruption and much more) were explored on the show plus some issues not as easily tackled in regular everyday series. But at the heart of what makes this show work was the interactions, often quite comical and amusing in nature, between our three leads and of course a lot of support from the rest of the main supporting cast.
List so far...
1) Star Trek (1966-1969)
2) The Twilight Zone (1959-1964)
3) The Outer Limits (1963-1965)
4) The Simpsons (1989-present)
5) The X-Files (1993-2002)
6) Saturday Night Live (1975-present)
7) All in the Family (1968-1979)
8) The Jeffersons (1975-1985)
9) M*A*S*H (1972-1983)
10) Lost (2004-2010)
11) The d**k Van Dyke Show (1961-1966)
12) Gunsmoke (1955-1975)
13) Miami Vice (1984-1990)
14) Arrested Development (2003-2006)
15) Three's Company (1976-1984)
16) Married with Children (1987-1997)
17) The Fugitive (1963-1967)
18) The Wild Wild West (1965-1969)
19) Thriller (1960-1962)
20) South Park (1997-present)
21) Firefly (2002-2003)
22) Archer (2009-present)
23) Kolchak: The Night Stalker (1974-1975)
24) Mary Tyler Moore (1970-1977)
25) The Ed Sullivan Show (1948-1971)
26) Bonanza (1959-1973)
27) Freaks and Geeks (1999-2000)
28) King of the Hill (1997-2010)
29) Batman: The Animated Series (1992-1995)
30) Mystery Science Theater 3000 (1989-1999)
31) Seinfeld (1989-1998)
32) The Incredible Hulk (1978-1982)
33) Beavis and Butt-Head (1993-1997, 2011- Present)
34) Double Dare (1986-1993)
35) I Love Lucy (1951-1957)
36) The Adventures of Ozzie and Harriet (1952-1966)
37) Leave It To Beaver (1957-1963)
38) The Honeymooners (1953-1956)
39) Family Ties (1982-1989)
40) Prison Break (2005-2009)
41) Frasier (1993-2004)
42) Gilligan's Island (1964-1967)
43) The Wonder Years (1988-1993)
44) Veronica Mars (2004-2008)
45) Penn & Teller: Bulls**t! (2003-2010)
46) Have Gun Will Travel (1957 - 1963)
47) Daria (1997-2002)
48) Chappelle's Show (2003-2006)
49) Futurama (1999-2003, 2008-present)
50) It Takes a Thief (1968-1970)
51) Star Trek: The Next Generation (1987-1994)
52) Lost in Space (1965-1968)
53) Twin Peaks (1990-1991)
54) Cheers (1982-1993)
55) Batman (1966-1968)
56) The Man From U.N.C.L.E. (1964-1968)
57) The Untouchables (1959-1963)
58) The Munsters (1964-1966)
59) The Invaders (1967-1968)
60) The Addams Family (1964-1966)
61) Eerie, Indiana (1991-1992)
62) The Dukes of Hazzard (1979-1985)
63) Law & Order (1990-2010)
64) In Search Of...(1976-1982)
65) Quantam Leap (1989-1993)
66) Dragnet (1951-1959, 1967-1970)
67) Dream On (1990-1996)
68) Wild Palms (1993)
69) Buffy the Vampire Slayer (1997-2003)
70) One Day At A Time (1975-1984)
71) The Golden Girls (1985-1992)
72) Hawaii Five-O (1968-1980)
73) The A-Team (1983-1987)
74) The West Wing (1999-2006)
75) CHiPs (1977-1983)
76) Knight Rider (1982-1986)
77) Northern Exposure (1990-1995)
78) The Office (U.S. Version) (2005-Present)
79) Good Times (1974-1979)
80) The Andy Griffith Show (1960-1968)
81) Matlock (1986-1995)
82) Green Acres (1965-1971)
83) Perry Mason (1957-1966)
84) Columbo (1968-1978, 1989-2003)
85) Murder, She Wrote (1984-1996)
86) Charmed (1998-2006)
87) MacGyver (1985-1992)
88) Buck Rogers in the 25th Century (1979-1981)
89) Voyage to the Bottom of the Sea (1964-1968)
90) Babylon 5 (1993-1998)