|Left: A depiction of a generic thermodynamics-themed melting pot theory. Right: a cartoon of Daniel Brooks and Edward Wiley who got burned for their 1982 melting pot fueled Brooks-Wiley theory of evolution.|
Pot theorists, typically, tend to be lacking credentials in the hard physical sciences. Example melting pot theorists, include: Ludwig Bertalanffy, and his 1968 general systems theory; Erich Jantsch, and the general argument found in his 1980 Self-Organizing Universe, Peter Corning, and his 1981 synergy-based evolution theory; Daniel Brooks and Edward Wiley, and their 1982 Brooks-Wiley theory; among others.  The following cartoon, e.g., is a parody of the infamous 1982 Brooks-Wiley theory, from the article “Are Evolutionary Biologists Really Ready for the Extended Synthesis”, by David Tyler, portraying their argument as a "melting pot theory" wherein, in the end, Canadian zoologist Daniel Brooks is the one who gets "burned".
In fact commenting, in 2011 retrospect, on the adverse reaction to their theory: “Ed and I were stunned by [the] vicious tone. Why the rhetorical heat?” 
Of note, melting pot theorists, as the decades progress, as pattern seems to indicate, seem to build on each other, e.g. Corning, himself a pot theorist, cites Bertalanffy, a classical pot theorist; and so it is with newer pot theorist.
Other pot theorists include: Tullio Scrimali (2006), [add].
1. (a) Bertalanffy, Ludwig. (1968). General Systems Theory: Foundations, Development, Applications (pgs. 39-44; pgs. 192-97). New York: George Braziller.
(b) Corning, Peter. (1981). The Synergism Hypothesis: A Theory of Progressive Evolution (thermodynamics, 8+ pgs; energy, 52+ pgs; entropy, 6+ pgs; synergy, 16+ pgs). McGraw-Hill.
2. (a) Tyler, David. (2011). “Are Evolutionary Biologists Really Ready for the Extended Synthesis” (Ѻ), Science literature, ARN.org, Mar 18.
(b) Brooks, Daniel R. (2011). “The Extended Synthesis: Something Old, Something New”, Evolution: Education and Outreach, 4(1):3-7.